QUADRUPOLE AND OCTUPOLE COLLECTIVITY IN LIGHT PO ISOTOPES

被引：41

作者：

ALBER, D

ALFIER, R

BACH, CE

FOSSAN, DB

GRAWE, H

KLUGE, H

LACH, M

MAIER, KH

SCHRAMM, M

SCHUBART, R

WARING, MP

WOOD, L

HUBEL, H

ZHANG, JY

机构：

[1] UNIV BONN,INST STRAHLEN & KERNPHYS,W-5300 BONN,GERMANY

[2] SUNY STONY BROOK,STONY BROOK,NY 11794

[3] INST MODERN PHYS,LANZHOU,PEOPLES R CHINA

来源：

ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI | 1991年 / 339卷 / 02期

关键词：

D O I：

10.1007/BF01284056

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：

The level structure of Po-196 has been studied using a Dy-160 (Ar-40, 4n) reaction and a recoil-catcher technique to reduce fission. The results showed a sharp drop off in the first (2+) and (4+) energies relative to systematics implying an abrupt increase in the quadrupole collectivity at N = 112. In addition, second (2+) and (4+) states were identified at 859 and 1388 keV, respectively, suggesting the discovery of a 4p2h deformed band in Po isotopes which is related to known 2p2h proton bands in several Pb isotopes. A prompt W-183 (Ne-20, 5n) experiment located similar second 2+ and 4+ states at 1039 and 1483 keV in Po-198 providing corroboration and extended information on the properties of the new Po deformed bands. A measured halflife of 850 (90) ns for the 2491 keV (11-) state in Po-196 implied collective E3 contributions to the extracted B (E3; 11- --> 8+) = 27(5) W.u..

引用

页码：225 / 229

页数：5

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