ONSET OF COLLECTIVITY IN THE ODD-ODD NUCLEUS AS-72

被引：14
|
作者：
DORING, J
TABOR, SL
HOLCOMB, JW
JOHNSON, TD
RILEY, MA
WOMBLE, PC
机构：
[1] Department of Physics, Florida State University, Tallahassee
来源：
PHYSICAL REVIEW C | 1994年 / 49卷 / 05期
关键词：
D O I：
10.1103/PhysRevC.49.2419
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：
High-spin states in the odd-odd nucleus As-72 were investigated by means of coincidence measurements via the (Co(F,alphapn))-Co-59-F-19 and the (Cu(C,alphan))-Cu-65-C-12 reactions at beam energies of 55 MeV and 50 MeV, respectively. Two new rotational-like level sequences of probably opposite parities have been found to feed into the known 7(-) isomer at 562.8 keV. Lifetime measurements for some states of the positive-parity sequence using the Doppler shift attenuation method revealed transition strengths of B(E2) almost-equal-to 40 Weisskopf units. Thus, this band is interpreted as a collective structure built on the two-quasiparticle intruder configuration (pig9/2 x nug9/2).
引用
收藏
页码：2419 / 2426
页数：8
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