Shell structure from 100Sn to 78Ni:: Implications for nuclear astrophysics

被引：25

作者：

Grawe, H

Blazhev, A

Górska, M

Mukha, I

Plettner, C

Roeckl, E

Nowacki, F

Grzywacz, R

Sawicka, M

机构：

[1] GSI Darmstadt, D-64291 Darmstadt, Germany

[2] Univ Sofia, BU-1126 Sofia, Bulgaria

[3] Katholieke Univ Leuven, Louvain, Belgium

[4] RRC Kurchatov Inst, RU-123481 Moscow, Russia

[5] Yale Univ, New Haven, CT USA

[6] IReS, Strasbourg 2, France

[7] ORNL, Oak Ridge, TN USA

[8] Warsaw Univ, IEP, Warsaw, Poland

来源：

EUROPEAN PHYSICAL JOURNAL A | 2005年 / 25卷 / Suppl 1期

关键词：

D O I：

10.1140/epjad/i2005-06-025-1

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 single-particle structure and shell gap of Sn-100 is inferred from prompt in-beam and delayed gamma-ray spectroscopy of seniority and spin-gap isomers. Recent results in Ag-94,Ag-65 and Cd-98 stress the importance of large-scale shell model calculations employing realistic interactions for the isomerism, np-nh excitations and E2 polarisation of the Sn-100 core. The strong monopole interaction of the Delta l = 0 spin-flip partners pi g(9/2)-nu g(7/2) in N = 51 isotones below Sn-100 is echoed in the Delta l = 1 pi f(5/2)-nu g(9/2) pair of nucleons, which is decisive for the persistence of the N = 50 shell gap in Ni-78. This is corroborated by recent experimental data on Ni-70,Ni-76, Zn-78. The importance of monopole driven shell evolution for the appearance of new shell closures in neutron-rich nuclei and implications for r-process abundances near the N = 82 shell is discussed.

引用

页码：357 / 362

页数：6

共 42 条

[1] NUCLEAR-STRUCTURE STUDIES OF THE NEUTRON DEFICIENT N=50 NUCLEUS PD-96 [J].

ALBER, D ;

BERTSCHAT, HH ;

GRAWE, H ;

HAAS, H ;

SPELLMEYER, B .

ZEITSCHRIFT FUR PHYSIK A-HADRONS AND NUCLEI, 1989, 332 (02) :129-135

[2]

[Anonymous], 1998, NUCL STRUCTURE

[3] Observation of a core-excited E4 isomer in 98Cd -: art. no. 064304 [J].

Blazhev, A ;

Górska, M ;

Grawe, H ;

Nyberg, J ;

Palacz, M ;

Caurier, E ;

Dorvaux, O ;

Gadea, A ;

Nowacki, F ;

Andreoiu, C ;

de Angelis, G ;

Balabanski, D ;

Beck, C ;

Cederwall, B ;

Curien, D ;

Döring, J ;

Ekman, J ;

Fahlander, C ;

Lagergren, K ;

Ljungvall, J ;

Moszynski, M ;

Norlin, LO ;

Plettner, C ;

Rudolph, D ;

Sohler, D ;

Spohr, KM ;

Thelen, O ;

Weiszflog, M ;

Wisell, M ;

Wolinska, M ;

Wolski, W .

PHYSICAL REVIEW C, 2004, 69 (06) :064304-1

[4] The 8+ isomer in 78Zn and the doubly magic character of 78Ni [J].

Daugas, JM ;

Grzywacz, R ;

Lewitowicz, M ;

Achouri, L ;

Angélique, JC ;

Baiborodin, D ;

Bennaceur, K ;

Bentida, R ;

Béraud, R ;

Borcea, C ;

Bingham, C ;

Catford, WN ;

Emsallem, A ;

de France, G ;

Grawe, H ;

Jones, KL ;

Lemmon, RC ;

Jimenez, MJL ;

Nowacki, F ;

Santos, FD ;

Pfützner, M ;

Regan, PH ;

Rykaczewski, K ;

Sauvestre, JE ;

Sawicka, M ;

Sletten, G ;

Stanoiu, M .

PHYSICS LETTERS B, 2000, 476 (3-4) :213-218

[5] N=82 shell quenching of the classical r-process "waiting-point" nucleus 130C -: art. no. 162503 [J].

Dillmann, I ;

Kratz, KL ;

Wöhr, A ;

Arndt, O ;

Brown, BA ;

Hoff, P ;

Hjorth-Jensen, M ;

Köster, U ;

Ostrowski, AN ;

Pfeiffer, B ;

Seweryniak, D ;

Shergur, J ;

Walters, WB .

PHYSICAL REVIEW LETTERS, 2003, 91 (16)

[6] NUCLEAR SHELL STRUCTURE AT PARTICLE DRIP LINES [J].

DOBACZEWSKI, J ;

HAMAMOTO, I ;

NAZAREWICZ, W ;

SHEIKH, JA .

PHYSICAL REVIEW LETTERS, 1994, 72 (07) :981-984

[7] Identification of isomers in the N=Z+1 nucleus 95Ag -: art. no. 034306 [J].

Döring, J ;

Grawe, H ;

Schmidt, K ;

Borcea, R ;

Galanopoulos, S ;

Górska, M ;

Harissopulos, S ;

Hellström, M ;

Janas, Z ;

Kirchner, R ;

La Commara, M ;

Mazzocchi, C ;

Roeckl, E ;

Schwengner, R .

PHYSICAL REVIEW C, 2003, 68 (03)

[8]

DORING J, 2004, 20041 GSI, P12

[9] Monopole migration in 69,71,73Cu observed from β decay of laser-ionized 68-74Ni -: art. no. 054308 [J].

Franchoo, S ;

Huyse, M ;

Kruglov, K ;

Kudryavtsev, Y ;

Mueller, WF ;

Raabe, R ;

Reusen, I ;

Van Duppen, P ;

Van Roosbroeck, J ;

Vermeeren, L ;

Wöhr, A ;

Grawe, H ;

Kratz, KL ;

Pfeiffer, B ;

Walters, WB .

PHYSICAL REVIEW C, 2001, 64 (05) :543081-5430813

[10] Cd-98(48)50: The two-proton-hole spectrum in Sn-100(50)50 [J].

Gorska, M ;

Lipoglavsek, M ;

Grawe, H ;

Nyberg, J ;

Atac, A ;

Axelsson, A ;

Bark, R ;

Blomqvist, J ;

Cederkall, J ;

Cederwall, B ;

deAngelis, G ;

Fahlander, C ;

Johnson, A ;

Leoni, S ;

Likar, A ;

Matiuzzi, M ;

Mitarai, S ;

Norlin, LO ;

Palacz, M ;

Persson, J ;

Roth, HA ;

Schubart, R ;

Seweryniak, D ;

Shizuma, T ;

Skeppstedt, O ;

Sletten, G ;

Walters, WB ;

Weiszflog, M .

PHYSICAL REVIEW LETTERS, 1997, 79 (13) :2415-2418

← 1 2 3 4 5 →