New interpretation of shape coexistence in Zr-99

被引：22

作者：

Lhersonneau, G

Dendooven, P

Honkanen, A

Huhta, M

Jones, PM

Julin, R

Juutinen, S

Oinonen, M

Penttila, H

Persson, JR

Perajarvi, K

Savelius, A

Wang, JC

Aysto, J

机构：

[1] Department of Physics, University of Jyväskylä, Jyväskylä, FIN-40351

来源：

PHYSICAL REVIEW C | 1997年 / 56卷 / 05期

关键词：

D O I：

10.1103/PhysRevC.56.2445

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Levels in Zr-99 populated by beta decay of on-line mass separated Y-99 have been studied by gamma-ray spectroscopic methods, including gamma-gamma coincidences recorded with an array of ten Ge detectors and level-lifetime measurements. The formerly reported strongly collective character of the 53-keV transition turns out to be questionable. This implies a revision of the experimental evidence for shape coexistence in Zr-99. Transition rates and gamma-ray branching ratios make a new level at 679 keV with t(1/2) = 9 ns another candidate for a deformed state.

引用

页码：2445 / 2450

页数：6

共 21 条

[1] IBFFM PREDICTIONS FOR LOW-LYING SPHERICAL STATES IN THE SHAPE-COEXISTING ODD-ODD NUCLEUS Y-98 [J].

BRANT, S ;

PAAR, V ;

LHERSONNEAU, G ;

SCHULT, OWB ;

SEYFARTH, H ;

SISTEMICH, K .

ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI, 1989, 334 (04) :517-518

[2]

BRANT S, 1997, P 9 INT S CAPT GAMM

[3] New insights from studies of spontaneous fission with large detector arrays [J].

Hamilton, JH ;

Ramayya, AV ;

Zhu, SJ ;

TERAkopian, GM ;

Oganessian, YT ;

Cole, JD ;

Rasmussen, JO ;

Stoyer, MA .

PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, VOL 35, 1995, 35 :635-704

[4] Independent yields of neutron-rich nuclei in charged-particle induced fission [J].

Huhta, M ;

Dendooven, P ;

Honkanen, A ;

Lhersonneau, G ;

Oinonen, M ;

Penttila, H ;

Perajarvi, K ;

Rubchenya, V ;

Aysto, J .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1997, 126 (1-4) :201-204

[5]

Kantele J., 1995, HDB NUCL SPECTROMETR

[6]

LHERSONNEAU G, 1986, ACS SYM SER, V324, P202

[7] STRUCTURE OF THE N=59 NUCLEUS SR-97 - COEXISTENCE OF SPHERICAL AND DEFORMED STATES [J].

LHERSONNEAU, G ;

PFEIFFER, B ;

KRATZ, KL ;

OHM, H ;

SISTEMICH, K ;

BRANT, S ;

PAAR, V .

ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI, 1990, 337 (02) :149-159

[8] EVOLUTION OF DEFORMATION IN THE NEUTRON-RICH ZR REGION FROM EXCITED INTRUDER STATE TO THE GROUND-STATE [J].

LHERSONNEAU, G ;

PFEIFFER, B ;

KRATZ, KL ;

ENQVIST, T ;

JAUHO, PP ;

JOKINEN, A ;

KANTELE, J ;

LEINO, M ;

PARMONEN, JM ;

PENTTILA, H ;

AYSTO, J .

PHYSICAL REVIEW C, 1994, 49 (03) :1379-1390

[9] Detailed investigation of the beta-decay of the 9/2(+) ground state of Nb-99 to levels in Mo-99 [J].

Lhersonneau, G ;

Pfeiffer, B ;

Persson, JR ;

Suhonen, J ;

Toivanen, J ;

Campbell, P ;

Dendooven, P ;

Honkanen, A ;

Huhta, M ;

Jones, PM ;

Julin, R ;

Juutinen, S ;

Oinonen, M ;

Penttila, H ;

Perajarvi, K ;

Savelius, A ;

Jicheng, W ;

Wang, JC ;

Aysto, J .

ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI, 1997, 358 (03) :317-327

[10]

LHERSONNEAU G, UNPUB

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