Neutron to proton ratios of quasiprojectile and midrapidity emission in the 58Ni+58Ni reaction at 52 MeV/nucleon -: art. no. 014610

被引：14
|
作者：
Thériault, D
Vallée, A
Gingras, L
Larochelle, Y
Roy, R
April, A
Beaulieu, L
Grenier, F
Lemieux, F
Moisan, J
Samri, M
St-Pierre, C
Turbide, S
Borderie, B
Bougault, R
Buchet, P
Charvet, JL
Chbihi, A
Colin, J
Cussol, D
Dayras, R
Durand, D
Frankland, JD
Galichet, E
Guinet, D
Guiot, B
Lautesse, P
Lecolley, JF
Le Neindre, N
Lopez, O
Maskay, AM
Nalpas, L
Parlog, M
Pawlowski, P
Rivet, MF
Rosato, E
Steckmeyer, JC
Tamain, B
Vient, E
Volant, C
Wieleczko, JP
Yennello, SJ
Martin, E
Winchester, E
机构：
[1] Univ Laval, Dept Phys, Phys Nucl Lab, Quebec City, PQ G1K 7P4, Canada
[2] Univ Ibn Tofail, Lab Phys Nucl & Applicat, Kenitra, Morocco
[3] Inst Phys Nucl, CNRS, IN2P3, F-91406 Orsay, France
[4] Inst Sci Mat & Rayonnement, LPC, CNRS, IN2P3, F-14050 Caen, France
[5] Univ Caen, F-14050 Caen, France
[6] CEA Saclay, SPhN, DAPNIA, F-91191 Gif Sur Yvette, France
[7] CEA, GANIL, F-14076 Caen, France
[8] CNRS, IN2P3, F-14076 Caen, France
[9] Conservatoire Natl Arts & Metiers, F-75141 Paris 03, France
[10] Inst Phys Nucl, CNRS, IN2P3, F-69622 Villeurbanne, France
[11] Univ Lyon 1, F-69622 Villeurbanne, France
[12] Natl Inst Phys & Nucl Engn, RO-76900 Bucharest, Romania
[13] H Niewodniczanski Inst Phys, PL-31342 Krakow, Poland
[14] Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy
[15] Univ Naples Federico II, Sez INFN, I-80126 Naples, Italy
[16] Texas A&M Univ, Inst Cyclotron, College Stn, TX 77843 USA
来源：
PHYSICAL REVIEW C | 2005年 / 71卷 / 01期
关键词：
D O I：
10.1103/PhysRevC.71.014610
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：
By combining data from a charged particle Ni-58+Ni-58 experiment at 52 MeV/nucleon with an Ar-36+Ni-58 experiment at 50 MeV/nucleon for which free neutrons have been detected, an increase in the neutron to proton ratio of the whole nuclear material at midrapidity has been experimentally observed in the reaction Ni-58+Ni-58 at 52 MeV/nucleon. The neutron-to-proton ratio of the quasi-projectile emission is analyzed for the same reactions and is seen to decrease below the ratio of the initial system. Those observations suggest that an asymmetric exchange of neutrons and protons between the quasiprojectile and the midrapidity region exists.
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页数：13
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