Gross and fine structure of pion production excitation functions in p-nucleus and nucleus-nucleus reactions

被引:0
作者
Jakobsson, B
Berg, M
Carlen, L
Elmer, R
Fokin, A
Ghetti, R
Martensson, J
Noren, B
Oskarsson, A
Whitlow, HJ
Ekstrom, C
Ericsson, G
Romanski, J
vanVeldhuizen, EJ
Westerberg, L
Julien, J
Skeppstedt, O
Nybo, K
Thorsteinsen, TF
Amirelmi, S
Guttormsen, M
Lovhoiden, G
Bellini, V
Palazzolo, F
Sperduto, ML
Bondorf, JP
Mishustin, I
Avdeichikov, V
Lozhkin, OV
Murin, Y
机构
[1] UNIV UPPSALA, SVEDBERG LAB, UPPSALA, SWEDEN
[2] UNIV UPPSALA, DEPT NEUTRON PHYS, UPPSALA, SWEDEN
[3] CEN, SACLAY, FRANCE
[4] CHALMERS UNIV TECHNOL, DEPT PHYS, S-41296 GOTHENBURG, SWEDEN
[5] UNIV BERGEN, DEPT PHYS, BERGEN, NORWAY
[6] UNIV OSLO, DEPT PHYS, OSLO, NORWAY
[7] UNIV CATANIA, IST NAZL FIS NUCL, LAB NAZL SUD, CATANIA, ITALY
[8] NIELS BOHR INST, DK-2100 COPENHAGEN, DENMARK
[9] JOINT INST NUCL RES, DUBNA, RUSSIA
[10] VG KHLOPIN RADIUM INST, ST PETERSBURG 197022, RUSSIA
关键词
D O I
10.1103/PhysRevLett.78.3828
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Slow ramping of the CELSIUS storage ring has been utilized to measure the yield of charged pions in proton and heavy ion induced collisions with continuously varying beam energy. Boltzmann-Uehling-Uhlenbeck predictions, including Fermi momenta of nucleons in nuclei, follow the general shape of the p-nucleus excitation functions quite well except for a general overestimation of the backward emission. For heavy ion reactions the calculated yield also falls off faster with decreasing beam energy than the data. No statistically significant narrow resonances are observed.
引用
收藏
页码:3828 / 3831
页数:4
相关论文
共 31 条
[1]   SUBTHRESHOLD PIONS FROM THE COMPOUND NUCLEUS [J].
AICHELIN, J ;
BERTSCH, G .
PHYSICS LETTERS B, 1984, 138 (5-6) :350-352
[2]   QUANTUM MOLECULAR-DYNAMICS - A DYNAMIC MICROSCOPIC N-BODY APPROACH TO INVESTIGATE FRAGMENT FORMATION AND THE NUCLEAR-EQUATION OF STATE IN HEAVY-ION COLLISIONS [J].
AICHELIN, J .
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1991, 202 (5-6) :233-360
[3]   IMPORTANCE OF MOMENTUM-DEPENDENT INTERACTIONS FOR THE EXTRACTION OF THE NUCLEAR-EQUATION OF STATE FROM HIGH-ENERGY HEAVY-ION COLLISIONS [J].
AICHELIN, J ;
ROSENHAUER, A ;
PEILERT, G ;
STOECKER, H ;
GREINER, W .
PHYSICAL REVIEW LETTERS, 1987, 58 (19) :1926-1929
[4]   THRESHOLD PION-PRODUCTION IN HEAVY-ION COLLISIONS [J].
BERTSCH, GF .
PHYSICAL REVIEW C, 1977, 15 (02) :713-718
[5]  
CASSING W, 1990, PHYS REP, V188, P364
[6]   PREEQUILIBRIUM PROTON EMISSION INDUCED BY 80 AND 120 MEV PROTONS INCIDENT ON ZR-90 [J].
COWLEY, AA ;
VANKENT, A ;
LAWRIE, JJ ;
FORTSCH, SV ;
WHITTAL, DM ;
PILCHER, JV ;
SMIT, FD ;
RICHTER, WA ;
LINDSAY, R ;
VANHEERDEN, IJ ;
BONETTI, R ;
HODGSON, PE .
PHYSICAL REVIEW C, 1991, 43 (02) :678-686
[7]   EQUILIBRATION IN RELATIVISTIC NUCLEAR COLLISIONS - A MONTE-CARLO CALCULATION [J].
CUGNON, J ;
MIZUTANI, T ;
VANDERMEULEN, J .
NUCLEAR PHYSICS A, 1981, 352 (03) :505-534
[8]  
GUBER F, IN PRESS
[9]  
GUDIMA KK, 1978, J PHYS G, V5, P229
[10]  
INGEMARSSON A, 1994, 1994 1995 TSL, P8