Nuclear structure studies of short-lived neutron-rich nuclei with the novel large-scale isochronous mass spectrometry at the FRS-ESR facility

被引：105

作者：

Sun, B. ^{[1
,2
]}

Knoebel, R. ^{[1
,3
]}

Litvinov, Yu. A. ^{[1
,3
]}

Geissel, H. ^{[1
,3
]}

Meng, J. ^{[2
]}

Beckert, K. ^{[1
]}

Bosch, F. ^{[1
]}

Boutin, D. ^{[3
]}

Brandau, C. ^{[1
]}

Chen, L. ^{[3
]}

Cullen, I. J. ^{[4
]}

Dimopoulou, C. ^{[1
]}

Fabian, B. ^{[3
]}

Hausmann, M. ^{[5
]}

Kozhuharov, C. ^{[1
]}

Litvinov, S. A. ^{[1
,3
]}

Mazzocco, M. ^{[6
,7
]}

Montes, F. ^{[5
]}

Muenzenberg, G. ^{[1
]}

Musumarra, A. ^{[8
,9
]}

Nakajima, S. ^{[10
]}

Nociforo, C. ^{[1
]}

Nolden, F. ^{[1
]}

Ohtsubo, T. ^{[11
]}

Ozawa, A. ^{[12
]}

Patyk, Z. ^{[13
]}

Plass, W. R. ^{[3
]}

Scheidenberger, C. ^{[1
,3
]}

Steck, M. ^{[1
]}

Suzuki, T. ^{[11
]}

Walker, P. M. ^{[4
]}

Weick, H. ^{[1
]}

Winckler, N. ^{[1
,3
]}

Winkler, M. ^{[1
,3
]}

Yamaguchi, T. ^{[10
]}

机构：

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

[2] Beijing Univ, Sch Phys, Beijing 100871, Peoples R China

[3] Univ Giessen, D-35392 Giessen, Germany

[4] Univ Surrey, Guildford GU2 7XH, Surrey, England

[5] Michigan State Univ, E Lansing, MI 48824 USA

[6] Univ Padua, Dipartimento Fis, I-35131 Padua, Italy

[7] INFN C Sez Padova, I-35131 Padua, Italy

[8] INFN Lab Nazl Sud, I-95123 Catania, Italy

[9] Univ Catania, I-95123 Catania, Italy

[10] Saitama Univ, Saitama 3388570, Japan

[11] Niigata Univ, Niigata 9502181, Japan

[12] Univ Tsukuba, Ibaraki 3058571, Japan

[13] Soltan Inst Nucl Studies, PL-00681 Warsaw, Poland

来源：

NUCLEAR PHYSICS A | 2008年 / 812卷

关键词：

ATOMIC MASSES Z=13; 31-56; A=33; 79-146; measured masses using isochronous mass spectrometry technique; deduced two-neutron separation and neutron shell gap energies Comparison with other data and various nuclear mass models;

D O I：

10.1016/j.nuclphysa.2008.08.013

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 previously pioneered Isochronous Mass Spectrometry (IMS) has been extended by an additional precise magnetic-rigidity determination to enable accurate large-scale measurements of stored short-lived relativistic nuclei with the FRS-ESR facility at 382 MeV/u. With this novel experimental tool the mass resolving power and accuracy have been improved by a factor of about 3. The recorded broad-band revolution time spectrum corresponds to the mass-over-charge range of about 6%. A mass resolving power of 200 000 (FWHM) and a typical accuracy of 120 keV have been achieved almost over the entire spectrum. The masses of 35 neutron-rich nuclides have been directly measured in the element range from aluminum to barium. The Masses of 8 nuclides (As-85,As-86, Se-89, Ag-123, Te-138, I-140,I-141, Xe-143) have been measured for the first time. The results are compared with previous experimental data and theoretical predictions. The evolution of the N = 50 shell closure towards doubly-magic Ni-78 is discussed. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：1 / 12

页数：12

共 9 条

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H. Geissel
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A. Musumarra
C. Nociforo
F. Nolden
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Hyperfine Interactions, 2006, 173 : 49 - 54
[2] A new experimental approach for isochronous mass measurements of short-lived exotic nuclei with the FRS-ESR facility
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Knoebel, R.
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Sun, B.
Beckert, K.
Beller, P.
Bosch, F.
Boutin, D.
Brandau, C.
Chen, L.
Fabian, B.
Hausmann, M.
Kozhuharov, C.
Kurcewicz, J.
Litvinov, S. A.
Mazzocco, M.
Montes, F.
Muenzenberg, G.
Musumarra, A.
Nociforo, C.
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HYPERFINE INTERACTIONS, 2006, 173 (1-3): : 49 - 54
[3] Efficiency and rate capability studies of the time-of-flight detector for isochronous mass measurements of stored short-lived nuclei with the FRS-ESR facility
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[5] New results from isochronous mass measurements of neutron-rich uranium fission fragments with the FRS-ESR-facility at GSI
R. Knöbel
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Z. Patyk
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B. Sun
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