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ON E0 TRANSITIONS BETWEEN 0 + STATES IN THE SAME NUCLEUS. V. P. Garistov + O.K. Egorov A.A. Solnyshkin ++. + Institute for Nuclear Research and Nuclear Energy, Sofia, Bulgaria ++ Joint Institute for Nuclear Research, Dubna, Russia. - PowerPoint PPT Presentation
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+ Institute for Nuclear Research and Nuclear Energy, Sofia, Bulgaria ++ Joint Institute for Nuclear ON E0 TRANSITIONS BETWEEN 0 + STATES IN THE SAME NUCLEUS V. P. Garistov+ O.K. Egorov A.A. Solnyshkin++
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Page 1: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

+ Institute for Nuclear Research and Nuclear Energy, Sofia, Bulgaria

++Joint Institute for Nuclear Research, Dubna, Russia

ON E0 TRANSITIONS BETWEEN 0+ STATES IN

THE SAME NUCLEUS

V. P. Garistov+O.K. Egorov

A.A. Solnyshkin++

Page 2: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

20 02

monH R R R R

1( 1)

2 m

jmR j-mj-m j-m

j-m jmm

1R (-1)

2

+1

4 +

0 jm jm j-m j-mR -m

( )

2j 1

2

,...m j j

0 ± ± + - 0[R ,R ] = ±R [R ,R ] = 2R

+ + +- +R = 2Ω - b bb R = b 2Ω - b b

+0R = b b - Ω

+[b,b ] 1 + +[b,b] = [b ,b ] = 0

Page 3: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

2 2R b bb R b b b

0R b b

Holstein Primakoff transformation

+ + +monH = b b + bB bbA b + C

2E(n) = n + BnA + C

20 02

monH R R R R

Page 4: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

0

4

n

E

[ M

eV ]

E=an+bn2

Page 5: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

0 2 4 6 8 10 12 14 16 18 20

0,0

0,5

1,0

1,5

2,0

2,5

3,0

3,5

En

erg

y [M

eV]

Number of Monopole Bosons ( n )

S. R. Lesher, A. Aprahamian et al. (to be published)

V. P. Garistov rearrangement E0(n)=an-bn2

a=0.611, b=0.029913 Estimated Variance -> 0.00524058 Previous data

158Gd

0 2 4 6 8 10 12

0,0

0,5

1,0

1,5

2,0

2,5

Me

V

n

a=0.77795b=-0.06757

158Dy

0+

-2 0 2 4 6 8 10 12 14 16

0,0

0,5

1,0

1,5

2,0

2,5

a=0.58218b=-0.03338

Me

V

n

168Er0+

0+

Page 6: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

mishmash

0 5 10 15 20 250,0

0,5

1,0

1,5

2,0

2,5

3,0

3,5

4,0

0 2 4 6 8 10 12 14 160,0

0,5

1,0

1,5

2,0

2,5

1 2 3 4 5 6 7 8 9 10 11 12

0,5

1,0

1,5

2,0

2,5

0 2 4 6 8 10 12 14 160,0

0,5

1,0

1,5

2,0

2,5

MeV

n

a=0.80244b=-0.03282c=-1.30713

162Er

2+

n

2+

168Yb

a=0.55638b=-0.03817c=0.38816

MeV

n

168Er

6+

a=1.32377b=-0.09788c=-2.15658

n

a=0.5235b=-0.03604c=0.49834

168Yb

4+

Page 7: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria
Page 8: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

ОБНАРУЖЕНИЕ ВОЗБУЖДЕННОГО 0+-СОСТОЯНИЯ В ЯДРЕ 160DY С ЭНЕРГИЕЙ 681.3 КЭВ

И.Адам, Д.Д.Богаченко, В.П.Гаристов, О.К.Егоров, Т.А.Исламов, В.В.Колесников, В.И.Силаев, А.А.Солнышкин

Page 9: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

0 2 4 6 8 10

-0.5

0

0.5

1

1.5

2

ЭН

ЕР

ГИ

Я С

ОС

ТО

ЯН

ИЯ

, М

эВ

ЧИСЛО БОЗОНОВ

0+-СОСТОЯНИЯ

160Dy

Модель взаимодействующих бозонов

Page 10: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

FR Er. П-2. 24.03.72. СП-3. tэ=24 часа. Объектив 8*. h=20 мкм. 1 проход. H=581 Гс.

700 000

900 000

1 100 000

1 300 000

1 500 000

1 700 000

1 900 000

2 100 000

2 300 000

2 500 000

2 700 000

2 900 000

3 100 000

3 300 000

3 500 000

13000 18000 23000 28000 33000 38000 43000 48000 53000 58000 63000 68000 73000 78000

Y, мкм

N

578 628 678 728 778 828 878 928 978 1028 1078

Рис. I-2I

Page 11: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

FR Er. П-2. 24.03.72. СП-3. tэ=24 часа. Об. 8*. h=10 мкм. DY=20 мкм. 8 проходов. H=581 Гс. Wрасч = 80 мкм.

-40 000

-20 000

0

20 000

40 000

60 000

80 000

100 000

120 000

140 000

160 000

180 000

18300 18400 18500 18600 18700 18800 18900 19000 19100 19200 19300 19400 19500 19600 19700 19800 19900 20000

Ee, кэВ - Y, мкм

N

617,6 618,6 619,6 620,6 621,6 622,6 623,6 624,6 625,6 626,6 627,6 628,6 629,6

Рис. I-2I

Григорьев: ΣI=0.031 ΣI=0.14

K672.35I=0.020

K673.09I=0.025

K681.3I=0.046

K682.3I=0.094

Page 12: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

1952.3 (n=4)

1708.2 (n=3)

1456.7 (n=8)

1280.0 (n=2)

681.3 (n=1)

86.8 0.0 (n=0)

0+6

0+5

0+4

0+3

0+2

2+1

0+1

160Dy

0.015

0.033

<0.005

0.053

0.020

<0.005

<0.005

0.039 0.0024

<0.005

0.046

1952

.3

1708

.2

1456

.7

1280

.0

681.

3

1271

.0

1026

.9

775.

4

598.

767

2.3

428.

2

176.

7

495.

6

251.

5

244.

1

594.5Iγ < 0.3

2+ 2503.8

1822.5 {1822.4(3)}Iγ=0.24 Изв. РАН,2002

X > 0.66

0.024

Page 13: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

FR Er. П-2. 24.03.72. СП-3. tэ=24 часа. Об. 8*. h=10 мкм. DY=20 мкм. 8 прох. (-4 ÷ -1; +3 ÷ +6). H=581 Гс. w=95 мкм.

-20 000

-10 000

0

10 000

20 000

30 000

40 000

50 000

60 000

70 000

80 000

94000 94100 94200 94300 94400 94500 94600 94700 94800 94900 95000

Ee, кэВ - Y, мкм

N

1215,1 1216,1 1217,1 1218,1 1219,1 1220,1 1221,1 1222,1 1223,1

Рис. I-2I

K1271.89I=0,096

K1271.0I=0,024

K1274.25+K1276.0

ΣI=0.12

Page 14: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

Усредненный спектр по 2 ф/п FR Er П-2 и FR Er П-8. Об. 8*. h=10 мкм. DY=20 мкм. w=95 мкм.

-10 000

0

10 000

20 000

30 000

40 000

50 000

60 000

62200 62400 62600 62800 63000 63200 63400 63600 63800 64000 64200 64400 64600 64800 65000 65200

Ee, кэВ Y, мкм

N

957,6 959,6 961,6 963,6 965,6 967,6 969,6 971,6 973,6 975,6 977,6 979,6

Рис. I-2I+II*

1

(M1-M5)-966,18 160Dy

4

K-1026,90 160Dy2

K-1022,62 160Dy

3K-?

5K-?

Page 15: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

I=0.53

I=1.40

I<0.3

593.5

595.3

594.5

Page 16: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

X( (E0/E2) = 0.628235

N[17/An^(2/3)

X(X0/E2) = 0.576814

An=160;r0=1.02*An^(1/3);be2=5.94*0.01*An^(4/3);ro=0.7/An^(1/3);ea=1.44;ea^2*r0^4*ro^2/be2

Митропольский И.А. (теор.)препринт ЛИЯФ, 1095, 1985 г. наша оценка (эксп.)

X(X0/E2) > 0.66

Page 17: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

0,0

0,5

1,0

1,5

2,0

8-

7-

6-

5-

4-

3-

2-

1-

9-

7-

5-

3-

10+

8+

6+

4+

2+Energy

(

MeV

)

g.s.

0+0.530 MeV

1-

160Dy

Состояние 0+ при 0.530 MeV соответствует первому (двойная система с α-кластером) возбуждению по координате массовой асимметрии. Вращательные полосы отрицательной четности соответствуют возбуждению угловых колебаний изгиба в α-кластерной двойной системе.

Кластерная модель ядра

Page 18: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

0

500

1000

1500

calc.

5-

3-

1-

6-

5-

4-

3-

2-

1-

6+

4+

2+

0+

7-

5-

3-

1-

6+

4+

2+

0+

5-

3-

2-

6-

4-

3-

2-

5-

1-

6+

4+

2+

0+

4+

2+

0+

9-

7-

5-

3-

1-

8+

6+

4+

2+

Ene

rgy

(ke

V)

U238

0+

exp.

Кластерная модель ядра

Page 19: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria
Page 20: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria
Page 21: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria
Page 22: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria
Page 23: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

FR Er. П-2. 24.03.72. СП-3. tэ=24 часа. Об. 8*. h=10 мкм. DY=20 мкм. 8 проходов. H=581 Гс. w = 80 мкм.

-40 000

-20 000

0

20 000

40 000

60 000

80 000

100 000

120 000

140 000

160 000

180 000

18300 18400 18500 18600 18700 18800 18900 19000 19100 19200 19300 19400 19500 19600 19700 19800 19900 20000

Ee, кэВ - Y, мкм

N

617,6 618,6 619,6 620,6 621,6 622,6 623,6 624,6 625,6 626,6 627,6 628,6 629,6

Рис. I-2I

Григорьев: ΣI=0.031 ΣI=0.14

K672.35I=0.021

K673.09I=0.024

K681.3I=0.052

K682.3I=0.088

Page 24: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria
Page 25: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria
Page 26: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria
Page 27: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria
Page 28: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria
Page 29: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria
Page 30: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

СПАСИБО ЗА ВНИМАНИЕ!

Page 31: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

FR Er. П-2. 24.03.72. СП-3. tэ=24 часа. Об. 8*. h=10 мкм. DY=20 мкм. 8 прох. (-4 ÷ -1; +3 ÷ +6). H=581 Гс. w=95 мкм.

-20 000

-10 000

0

10 000

20 000

30 000

40 000

50 000

60 000

70 000

80 000

94000 94100 94200 94300 94400 94500 94600 94700 94800 94900 95000

Ee, кэВ - Y, мкм

N

1215,1 1216,1 1217,1 1218,1 1219,1 1220,1 1221,1 1222,1 1223,1

Рис. I-2I

K1271.0I=0,027

K1271.89I=0,093

K1274.25+K1276.0

ΣI=0.12

Page 32: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

140 142 144 146 148 150 152 154 156 158 160 162 164 166 168 170

0,0

0,2

0,4

0,6

0,8

1,0

1,2

1,4

1,6

1,8Э

НЕ

РГ

ИЯ

СО

СТ

ОЯ

НИ

Я, М

эВ

МАССОВОЕ ЧИСЛО

2+

1

0+

2

0+

3

2+

Dy

Page 33: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

140 142 144 146 148 150 152 154 156 158 160 162 164 166 168 170

0,0

0,2

0,4

0,6

0,8

1,0

1,2

1,4

1,6

1,8

ЭН

ЕР

ГИ

Я С

ОС

ТО

ЯН

ИЯ

, М

эВ

МАССОВОЕ ЧИСЛО

2+

1

0+

2

0+

3

Dy

Page 34: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

Суммарный спектр по трем фотопластинкам FR Er П-2, FR Er 2 П-8 и Ho 7.

-0,02

-0,01

0

0,01

0,02

0,03

0,04

18000 18200 18400 18600 18800 19000 19200 19400 19600 19800 20000

Ee, кэВ Y, мкм

D

615,4 617,4 619,4 621,4 623,4 625,4 627,4 629,4

Рис. III-2I+II+III

1

23

K672,35

K673,09K682,34

7

K681.3

Page 35: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

NEW 0+- EXCITED STATE WITH THE ENERGY OF 681.3 KEV IN 160DY NUCLEUS J.Adam1, D.Bogachenko2, V.P.Garistov3, O.K.Egorov2, T.A.Islamov1, V.V.Kolesnikov2, V.I.Silaev2, A.A.Solnyshkin1

1)Joint Institute for Nuclear Research, Dubna, Russia2)Institute Theoretical and Experimental Physics, Moscow, Russia

3)Institute for Nuclear Research and Nuclear Energy, Sofia, Bulgaria

The theoretical calculations [1] predict existence of a 0+ state with energy ~700 keV in 160Dy nucleus. For finding-out of existence of this 0+ state we measure β-spectrograms of [2] DLNP JINR for fractions Er (two photographic plates) and Ho (one photographic plate) using universal installation МАС-1 in ITEP [3]. At the analysis it was found out, that on all three photographic plates to the left of known line EIK with energy 682.3 keV below by energy on 1 keV, the peak comparable by intensity with the specified line is confidently observed. Our attempts to carry the mentioned peak to a conversion line or to any of known from the literature [4] γ-transitions in 160Dy nucleus have not crowned with success. Then we proposed, that this peak is probably caused by new transition with energy 681.3 keV, unloading the corresponding new raised state with energy 681.3 keV to the ground state. Except for the specified state, from experiment four more states with excitation energies 1280.0, 1456.7, 1708.2 and 1952.3 keV are known. Considering, that from these levels transitions to the entered by us 681.3 keV level are possible, we have undertaken searches of such transitions. As a result one of such transitions with energy 1271.0 keV, between states 1952.3 and 681.3 keV, has been found out. In spite of that this fact already is powerful enough argument in favour of existence of a state 681.3 keV in a nucleus 160Dy, searches of other transitions now proceed.1. A.A.Solnyshkin, e.a. // Phys. Rev. C. 2005. V.72. P. 064321-1.2. Abdurazakov A.A. e.a. “Beta-spectrographs with constant magnets”, Tashkent, Uzbekistan, 1972.3. Egorov O.K. e.a. JTF. 2003. V. 48, № 3.4. I.Adam e.a.// Izv. RAN, ser. Fiz. 2002. V.66. P.1384 and C.W. Reich // Nuclear Data Sheets 105, 557 (2005).

Page 36: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

966.8 8+0 -0.005(7) %1801.2 8+2 -0.003(3) %1882.7 8-2 0.004(4) %1901.2 9-2 0.006(3) % 2022.0 9+2 0.00(1) % 2112.8 8-1 0.034(8) %

γ γ 1177 γ 121.7 I=0.07γ γ 872 γ130.87 I=0.014

Page 37: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

FR Er. П-2. 24.03.72. СП-3. tэ=24 часа. Об. 8*. h=10 мкм. DY=20 мкм.8 прох. (-4 ÷ -1; +3 ÷ +6). H=581 Гс. w=105 мкм.

-10 000

0

10 000

20 000

30 000

40 000

50 000

60 000

70 000

80 000

94000 94200 94400 94600 94800 95000 95200 95400 95600 95800 96000 96200 96400 96600 96800 97000

Ee, кэВ - Y, мкм

N

1215,1 1217,1 1219,1 1221,1 1223,1 1225,1 1227,1 1229,1 1231,1 1233,1 1235,1 1237,1 1239,1

Рис. I-2I

2

K-1271,89 160Dy

1

K-1271,00 160Dy

FR Er. П-2. 24.03.72. СП-3. tэ=24 часа. Об. 8*. h=10 мкм. DY=20 мкм.8 прох. (-4 ÷ -1; +3 ÷ +6). H=581 Гс. w=105 мкм.

-10 000

0

10 000

20 000

30 000

40 000

50 000

60 000

70 000

80 000

94000 94200 94400 94600 94800 95000 95200 95400 95600 95800 96000 96200 96400 96600 96800 97000

Ee, кэВ - Y, мкм

N

1215,1 1217,1 1219,1 1221,1 1223,1 1225,1 1227,1 1229,1 1231,1 1233,1 1235,1 1237,1 1239,1

Рис. I-2I

2

K-1271,89 160Dy

1

K-1271,00 160Dy

Page 38: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

№ Название E* , кэВ Yc расч, мкм Yc апр , мкм Ee апр , кэВ Eапр , кэВ DE , кэВ S лин , мкм2 S / Sн

s, % r, см e Jэксп J*

1 (M1-M5)-966,18 160Dy ? #ЗНАЧ! 63030 964,272 1018,061 #ЗНАЧ! 10775161,487 1,267 12,2 7,94163 0,29 0,053 –

2 K-? ? #ЗНАЧ! 63590 968,748 1022,536 #ЗНАЧ! 1494245,255 0,176 34,6 7,96900 0,29 0,007 –

3 K-? ? #ЗНАЧ! 63870 970,987 1024,775 #ЗНАЧ! 1562967,577 0,184 24,9 7,98269 0,29 0,008 –

4 K-1026,90 (?) 160Dy 1026,9 64135,6 64115 972,947 1026,735 0,165 2131221,229 0,251 21,9 7,99467 0,29 0,011 –

5 K-? ? #ЗНАЧ! 64250 974,026 1027,815 #ЗНАЧ! 1443405,039 0,170 33,8 8,00127 0,41 0,005 –

н K-1431,66 (3) 160Dy 1431,66 113760,0 113740 1377,706 1431,494 0,166 8503990,489 1,000 10,43392 0,29 0,055 0,055 (12)

Page 39: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

№ НазваниеE*

,

кэВ

Yc расч,

мкм

Yc апр ,

мкм

Ee апр ,

кэВ

E апр ,

кэВ

D E ,

кэВ

S лин ,

мкм2S / Sн r, см e Jэксп J*

1K-1271,00 ()

160Dy1271 94258,4 94250

1217,143

1270,931

-0,069 1850000 0,2189,4733

20,29 0,011 –

2K-1271,89 ()

160Dy1271,

8994367,0 94360

1218,044

1271,833

-0,057 8000000 0,9419,4787

30,29 0,047

0,12 (2)

нK-1431,66 (3)

160Dy1431,

66113760,

0113740

1377,706

1431,494

-0,1668503990

,491,000

10,43392

0,29 0,0550,055 (12)

Page 40: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

FR Er П-2 (1). 24.03.72. СП-3. Облуч. 2 часа. tэ=24 часа. Объектив 8*. h=20 мкм. 12 прох. по 0,4 мм. H=580 Гс.

0,51

0,515

0,52

0,525

0,53

0,535

0,54

0,545

0,55

0,555

0,56

0,565

18000 18200 18400 18600 18800 19000 19200 19400 19600 19800 20000 20200 20400

Ee, кэВ Y, мкм

D

615,4 617,4 619,4 621,4 623,4 625,4 627,4 629,4 631,4 633,4

Рис. III-2

1 2

3

A

B

K681.3I=0.032

K682.3I=0.091K672.35

I=0.018 K673.09I=0.020

Григорьев: ΣI=0.031 ΣI=0.14

Page 41: +  Institute for Nuclear Research and Nuclear                       Energy,  Sofia, Bulgaria

№ Линия Eэксп , кэВ Jэксп J*

A – 670,923 0,023 –

1 K672,35 (E0) 672,277 0,035 –

2 K673,09 673,066 0,048 –

B – 681,212 0,054 –

3 K682,34 682,466 0,150 0,150

FR Er П-2 (1). 24.03.72. СП-3. Облуч. 2 часа. tэ=24 часа. Объектив 8*. h=20 мкм. 12 прох. по 0,4 мм. H=580 Гс.

0,51

0,515

0,52

0,525

0,53

0,535

0,54

0,545

0,55

0,555

0,56

0,565

18000 18200 18400 18600 18800 19000 19200 19400 19600 19800 20000 20200 20400

Ee, кэВ Y, мкм

D

615,4 617,4 619,4 621,4 623,4 625,4 627,4 629,4 631,4 633,4

Рис. III-2

1 2

3

A

B


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