An O(6)->SU(3) particle-hole symmetry transition near the Z=50 closed shell

被引：10

作者：

deCoster, C

Decroix, B

Heyde, K

机构：

[1] Institute for Theoretical Physics, Vakgroep Subatomaire Stralingsfysica, B-9000 Gent

来源：

PHYSICS LETTERS B | 1996年 / 379卷 / 1-4期

关键词：

many-particle-hole excitations; intruder-spin; dynamical symmetry; normal and intruder band mixing;

D O I：

10.1016/0370-2693(96)00427-3

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Particle-hole excitations near closed shells are incorporated in an extended interacting boson model (EIBM) thereby enlarging the region of applicability of this algebraic approach. We study the consequences of classifying various many-particle-hole (mp-nh) excitations into multiplets, according to dynamical symmetries of the EIBM. Applications to the Z = 50 region are presented for the Ru-Cd-Te-Ba nuclei. Here, we show (i) that the ''global'' smooth change in the intruder multiplet band structure is described by an O(6) --> SU(3) symmetry transition and (ii) how the ''local'' mixing between the intruder structure and the regular anharmonic vibrational states (U(5)) radically changes in the above O(6) --> SU(3) symmetry transition.

引用

页码：20 / 26

页数：7

共 27 条

[1] OBSERVATION OF 0+ STATES IN CD-118 AND THE SYSTEMATICS OF INTRUDER STATES [J].

APRAHAMIAN, A ;

BRENNER, DS ;

CASTEN, RF ;

GILL, RL ;

PIOTROWSKI, A ;

HEYDE, K .

PHYSICS LETTERS B, 1984, 140 (1-2) :22-28

[2] STUDY OF CD-110 FROM THE IN-110(M) BETA-DECAY [J].

BERTSCHY, M ;

DRISSI, S ;

GARRETT, PE ;

JOLIE, J ;

KERN, J ;

MANNANAL, SJ ;

VORLET, JP ;

WARR, N ;

SUHONEN, J .

PHYSICAL REVIEW C, 1995, 51 (01) :103-114

[3] COLLECTIVE BANDS IN EVEN MASS SN ISOTOPES [J].

BRON, J ;

HESSELINK, WHA ;

VANPOELGEEST, A ;

ZALMSTRA, JJA ;

UITZINGER, MJ ;

VERHEUL, H ;

HEYDE, K ;

WAROQUIER, M ;

VINCX, H ;

VANISACKER, P .

NUCLEAR PHYSICS A, 1979, 318 (03) :335-351

[4] THE ENIGMA OF CD-114 - A CLASSICAL CASE OF AMBIGUITIES IN QUANTUM-MECHANICAL STATE MIXING [J].

CASTEN, RF ;

JOLIE, J ;

BORNER, HG ;

BRENNER, DS ;

ZAMFIR, NV ;

CHOU, WT ;

APRAHAMIAN, A .

PHYSICS LETTERS B, 1992, 297 (1-2) :19-24

[5]

DECOSTER C, 1996, IN PRESS NUCL PHYS A

[6] SYSTEMATIC STUDY OF THE MIXED GROUND-STATE AND INTRUDER BANDS IN CD-110, CD-112, CD-114 [J].

DELEZE, M ;

DRISSI, S ;

KERN, J ;

TERCIER, PA ;

VORLET, JP ;

RIKOVSKA, J ;

OTSUKA, T ;

JUDGE, S ;

WILLIAMS, A .

NUCLEAR PHYSICS A, 1993, 551 (02) :269-294

[7] THE CD-112 NUCLEUS - A LABORATORY FOR THE STUDY OF COLLECTIVE EXCITATIONS [J].

DELEZE, M ;

DRISSI, S ;

JOLIE, J ;

KERN, J ;

VORLET, JP .

NUCLEAR PHYSICS A, 1993, 554 (01) :1-44

[8] QUADRUPOLE COLLECTIVE PROPERTIES OF CD-114 [J].

FAHLANDER, C ;

BACKLIN, A ;

HASSELGREN, L ;

KAVKA, A ;

MITTAL, V ;

SVENSSON, LE ;

VARNESTIG, B ;

CLINE, D ;

KOTLINSKI, B ;

GREIN, H ;

GROSSE, E ;

KULESSA, R ;

MICHEL, C ;

SPRENG, W ;

WOLLERSHEIM, HJ ;

STACHEL, J .

NUCLEAR PHYSICS A, 1988, 485 (02) :327-359

[9] FULL-SYMMETRY AND MIXED-SYMMETRY STATES IN CD-110, CD-112, CD-114 [J].

GIANNATIEMPO, A ;

NANNINI, A ;

PEREGO, A ;

SONA, P ;

MAINO, G .

PHYSICAL REVIEW C, 1991, 44 (04) :1508-1514

[10] STUDY OF CD-112 VIA HIGH-RESOLUTION ((D)OVER-RIGHT-ARROW, (D)OVER-RIGHT-ARROW') AND ((P)OVER-RIGHT-ARROW, (P)OVER-RIGHT-ARROW') REACTIONS AND IBA MODEL-CALCULATIONS [J].

HERTENBERGER, R ;

ECKLE, G ;

ECKLE, FJ ;

GRAW, G ;

HOFER, D ;

KADER, H ;

SCHIEMENZ, P ;

CATADANIL, G ;

HATEGAN, C ;

FUJIWARA, N ;

HOSONO, K ;

KONDO, M ;

MATSUOKA, M ;

NORO, T ;

SAITO, T ;

KATO, S ;

MATSUKI, S ;

BLASI, N ;

MICHELETTI, S ;

DELEO, R .

NUCLEAR PHYSICS A, 1994, 574 (03) :414-452

← 1 2 3 →