HEAVY-ION IN-BEAM STUDIES OF THE NUCLEUS NB-87

被引：36

作者：

JUNGCLAUS, A

LIEB, KP

GROSS, CJ

HEESE, J

RUDOLPH, D

BLUMENTHAL, DJ

CHOWDHURY, P

ENNIS, PJ

LISTER, CJ

WINTER, C

EBERTH, J

SKODA, S

BENTLEY, MA

GELLETLY, W

VARLEY, BJ

机构：

[1] YALE UNIV,AW WRIGHT NUCL STRUCT LAB,NEW HAVEN,CT 06511

[2] UNIV COLOGNE,INST KERNPHYS,W-5000 COLOGNE 41,GERMANY

[3] UNIV MANCHESTER,MANCHESTER M13 9PL,LANCS,ENGLAND

[4] SERC,DARESBURY LAB,NUCL STRUCT FACIL,WARRINGTON WA4 4AD,CHESHIRE,ENGLAND

来源：

ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI | 1991年 / 340卷 / 02期

关键词：

D O I：

10.1007/BF01303824

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 transitional nucleus Nb-87 up to 14 MeV excitation have been established for the first time via the reactions Ca-40(Cr-50, 3p)Nb-87 and Ni-58(S-32, 3p)Nb-87. The Nb-87 gamma-radiations have been identified through gamma-ray spectra taken in coincidence with the evaporation residues detected in the Daresbury recoil separator or with multiple proton emission. Gamma-gamma coincidences, DCO ratios, gamma-ray angular distributions and lifetimes have been measured. A total of some 100 transitions have been placed into a level scheme comprising of sixty states. The one-quasiparticle (1qp) bands of either parity and several other band-like structures have been identified, some containing aligned g9/2 nucleons. Moderately enhanced E2 in-band transitions of 13-48 W.u. as well as several weak E2 yrast transitions connecting bands with different quasiparticle numbers have been found. Similarities with respect to the N = 46 isotones Rb-83, Sr-84, Y-85, Zr-86 and 88Mo are discussed. PACS: 21.10.R; 23.20.ck; 27.50. + e

引用

页码：125 / 139

页数：15