STUDIES OF SUPERDEFORMATION IN THE GADOLINIUM NUCLEI

被引：55

作者：

HAAS, B

JANZEN, VP

WARD, D

ANDREWS, HR

RADFORD, DC

PREVOST, D

KUEHNER, JA

OMAR, A

WADDINGTON, JC

DRAKE, TE

GALINDOURIBARRI, A

ZWARTZ, G

FLIBOTTE, S

TARAS, P

RAGNARSSON, I

机构：

[1] MCMASTER UNIV,DEPT PHYS,TANDEM ACCELERATOR LAB,HAMILTON L8S 4K1,ONTARIO,CANADA

[2] UNIV TORONTO,DEPT PHYS,TORONTO M5S 1A7,ONTARIO,CANADA

[3] UNIV MONTREAL,PHYS NUCL LAB,MONTREAL H3C 3J7,QUEBEC,CANADA

[4] LUND INST TECHNOL,DEPT MATH PHYS,S-221 LUND,SWEDEN

[5] CRN,F-67037 STRASBOURG,FRANCE

来源：

NUCLEAR PHYSICS A | 1993年 / 561卷 / 02期

关键词：

NUCLEAR REACTIONS SN-120; SN-122; 124SN(SI-28; SI-29; SI-30; XN); E; =155; MEV; MEASURED E(GAMMA)I(GAMMA); GAMMA-GAMMA COINCIDENCE; DCO RATIOS; 145GD; 146GD; 147GD; 148GD; 149GD SUPERDEFORMED BANDS; COMPOTON--SUPPRESSED HPGE DETECTOR ARRAY; 4-PI BISMUTH GERMANATE BALL. DEDUCED (GAMMA)-RAY MULTIPLICITIES AND TOTAL GAMMA-RAY SUM ENERGY ASSOCIATED WITH SUPERDEFORMED BANDS; CRANKED SHELL-MODEL STRUTINSKI CALCULATIONS; DEDUCED ORBITAL ASSIGNMENTS; ORBITAL CONTRIBUTORS TO ALIGNED SPIN; PROPOSED SELF-CONSISTENT SPIN ASSIGNMENTS FOR SUPERDEFORMED BANDS;

D O I：

10.1016/0375-9474(93)90153-O

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：

We have used the 8pi gamma-ray spectrometer at the Chalk River TASCC facility to study superdeformed rotational bands in the chain of isotopes Gd-145-149. The five bands already known have been extended to higher spin, while four new excited bands have been discovered. The use of very similar reactions, data-acquisition parameters and data-analysis techniques, combined with the enlarged set of data, has allowed us for the first time to approach the topic of superdeformation in the A = 150 mass region from a comprehensive point of view. Transition energies of neighbouring nuclei were compared to extract effective aligned spins of the added particle. Such a comparison requires knowledge of relative nuclear spins, which we have to assume. Nevertheless, we find that a very illustrative picture emerges making it possible to understand all nine bands in the Gd isotopes within a very simple scheme of orbital assignments.

引用

页码：251 / 284

页数：34

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