In-beam γ-ray spectroscopy and inclusive two-proton knockout cross section measurements at N ≈ 40

被引：87

作者：

Adrich, P. ^{[1
]}

Amthor, A. M. ^{[1
,2
]}

Bazin, D. ^{[1
]}

Bowen, M. D. ^{[1
,2
]}

Brown, B. A. ^{[1
,2
]}

Campbell, C. M. ^{[1
,2
]}

Cook, J. M. ^{[1
,2
]}

Gade, A. ^{[1
,2
]}

Galaviz, D. ^{[1
]}

Glasmacher, T. ^{[1
,2
]}

McDaniel, S. ^{[1
,2
]}

Miller, D. ^{[1
,2
]}

Obertelli, A. ^{[1
]}

Shimbara, Y. ^{[1
]}

Siwek, K. P. ^{[1
,2
]}

Tostevin, J. A. ^{[3
]}

Weisshaar, D. ^{[1
]}

机构：

[1] Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA

[2] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA

[3] Univ Surrey, Fac Engn & Phys Sci, Dept Phys, Surrey GU2 7XH, England

来源：

PHYSICAL REVIEW C | 2008年 / 77卷 / 05期

关键词：

D O I：

10.1103/PhysRevC.77.054306

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：

In-beam gamma-ray spectroscopy of Fe-66,Fe-68 following intermediate-energy one- and two-proton knockout from cobalt and nickel secondary beams has been performed at the National Superconducting Cyclotron Laboratory. New transitions have been observed in Fe-66 and Fe-68. This is the first observation of gamma-ray transitions in Fe-68. In addition, Cr-64 was produced using the Be-9(Fe-66,Cr-64)X two-proton knockout reaction. An unexpectedly low inclusive cross section is observed for this reaction, an order of magnitude smaller than for the Be-9(Ni-68,Fe-66)X reaction. This observation is discussed in terms of a significant structural difference between Fe-66 and Cr-64 and considerable admixtures of nu(pf)(n-2) (g(9/2))(+2) configurations in the ground and excited states of Cr-64 at N = 40.

引用

页数：6

共 33 条

[1]

Aoi N., 2006, Journal of Physics: Conference Series, V49, P190, DOI 10.1088/1742-6596/49/1/046

[2] The S800 spectrograph [J].

Bazin, D ;

Caggiano, JA ;

Sherrill, BM ;

Yurkon, J ;

Zeller, A .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2003, 204 :629-633

[3] New direct reaction: Two-proton knockout from neutron-rich nuclei [J].

Bazin, D ;

Brown, BA ;

Campbell, CM ;

Church, JA ;

Dinca, DC ;

Enders, J ;

Gade, A ;

Glasmacher, T ;

Hansen, PG ;

Mueller, WF ;

Olliver, H ;

Perry, BC ;

Sherrill, BM ;

Terry, JR ;

Tostevin, JA .

PHYSICAL REVIEW LETTERS, 2003, 91 (01)

[4] The nuclear shell model towards the drip lines [J].

Brown, B. A. .

PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, VOL 47, 2001, 47 (02) :517-599

[5] SHAPE TRANSITION IN NEUTRON RICH SODIUM ISOTOPES [J].

CAMPI, X ;

FLOCARD, H ;

KERMAN, AK ;

KOONIN, S .

NUCLEAR PHYSICS A, 1975, 251 (02) :193-205

[6]

*CERN PROGR LIB, 1993, GEANT3 DET DESCR SIM

[7] Changes in νg9/2 shape polarisation across the odd neutron-rich Cr isotopes [J].

Deacon, AN ;

Freeman, SJ ;

Janssens, RVF ;

Xu, FR ;

Carpenter, MP ;

Calderin, IR ;

Chowdhury, P ;

Hammond, NJ ;

Lauritsen, T ;

Lister, CJ ;

Seweryniak, D ;

Smith, JF ;

Tabor, SL ;

Varley, BJ ;

Zhu, S .

PHYSICS LETTERS B, 2005, 622 (1-2) :151-158

[8] Shell structure of exotic nuclei [J].

Dobaczewski, J. ;

Michel, N. ;

Nazarewicz, W. ;

Ploszajczak, M. ;

Rotureau, J. .

PROGRESS IN PARTICLE AND NUCLEAR PHYSICS VOL 59, NO 1, 2007, 59 (01) :432-445

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

DOBACZEWSKI, J ;

HAMAMOTO, I ;

NAZAREWICZ, W ;

SHEIKH, JA .

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

[10] Low-lying levels in 59Cr:: Inadequacy of the fp model space and onset of deformation -: art. no. 064301 [J].

Freeman, SJ ;

Janssens, RVF ;

Brown, BA ;

Carpenter, MP ;

Fischer, SM ;

Hammond, NJ ;

Honma, M ;

Lauritsen, T ;

Lister, CJ ;

Khoo, TL ;

Mukherjee, G ;

Seweryniak, D ;

Smith, JF ;

Varley, BJ ;

Whitehead, M ;

Zhu, S .

PHYSICAL REVIEW C, 2004, 69 (06) :064301-1

← 1 2 3 4 →