MESON-EXCHANGE CURRENT EFFECTS IN NUCLEON PHOTOEMISSION

被引：15

作者：

BENENTI, G ^{[1
]}

GIUSTI, C ^{[1
]}

PACATI, FD ^{[1
]}

机构：

[1] IST NAZL FIS NUCL,PAVIA,ITALY

来源：

NUCLEAR PHYSICS A | 1994年 / 574卷 / 04期

关键词：

D O I：

10.1016/0375-9474(94)90956-3

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 role of meson-exchange currents in (gamma, p) and (gamma, n) reactions at intermediate energies is investigated in the frame of a direct knockout model where the photon interacts with a pair of correlated nucleons. Realistic short-range correlations and final-state interactions are included in the calculations. Direct and exchange terms are considered. The results for O-16(gamma, p) and O-16(gamma, n) indicate that the two-body seagull current significantly affects the cross sections. In both cases the size and the shape of the experimental angular distributions are fairly well reproduced.

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页码：716 / 730

页数：15

相关论文

共 52 条

[1] ANGULAR-DISTRIBUTIONS FOR O-16(GAMMA,P)N-15 AT INTERMEDIATE ENERGIES [J].

ADAMS, GS ;

KINNEY, ER ;

MATTHEWS, JL ;

SAPP, WW ;

SOOS, T ;

OWENS, RO ;

TURLEY, RS ;

PIGNAULT, G .

PHYSICAL REVIEW C, 1988, 38 (06) :2771-2776

[2] HIGH-RESOLUTION MEASUREMENTS OF C-12(GAMMA,ETA) AND THE IMPLICATIONS FOR THE (GAMMA,N) REACTION-MECHANISM AT INTERMEDIATE-ENERGY [J].

ANNAND, JRM ;

CRAWFORD, GI ;

HARTY, PD ;

MCGEORGE, JC ;

MILLER, GJ ;

ANDERSSON, BE ;

ADLER, JO ;

BULYCHJOV, SA ;

ISAKSSON, L ;

RUIJTER, H ;

SCHRODER, B .

PHYSICAL REVIEW LETTERS, 1993, 71 (17) :2703-2706

[3] MEASUREMENT OF O-16(GAMMA,N)O-15 AT MEDIUM ENERGIES [J].

BEISE, EJ ;

DODSON, G ;

GARCON, M ;

HOIBRATEN, S ;

MAHER, C ;

PHAM, LD ;

REDWINE, RP ;

SAPP, W ;

WILSON, KE ;

WOOD, SA ;

DEADY, M .

PHYSICAL REVIEW LETTERS, 1989, 62 (22) :2593-2596

[4] LOWEST-ORDER AND HYPER-NETTED-CHAIN CALCULATIONS OF NUCLEAR-MATTER [J].

BENHAR, O ;

CIOFIDEGLIATTI, C ;

FANTONI, S ;

ROSATI, S ;

KALLIO, A ;

LANTTO, L ;

TOROPAINEN, P .

PHYSICS LETTERS B, 1976, 64 (04) :395-398

[5] ORTHOGONALITY, ANTISYMMETRY AND C M EFFECTS IN DIRECT PHOTOREACTIONS [J].

BOFFI, S ;

CENNI, R ;

GIUSTI, C ;

PACATI, FD .

NUCLEAR PHYSICS A, 1984, 420 (01) :38-50

[6] DIRECT MECHANISM IN MEDIUM ENERGY (GAMMA,PO) REACTIONS [J].

BOFFI, S ;

GIUSTI, C ;

PACATI, FD .

NUCLEAR PHYSICS A, 1981, 359 (01) :91-108

[7] NUCLEAR RESPONSE IN ELECTROMAGNETIC-INTERACTIONS WITH COMPLEX NUCLEI [J].

BOFFI, S ;

GIUSTI, C ;

PACATI, FD .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1993, 226 (1-2) :1-101

[8] DYNAMICS OF DIRECT PHOTOEMISSION OF PROTON-NEUTRON PAIRS [J].

BOFFI, S ;

GIUSTI, C ;

PACATI, FD ;

RADICI, M .

NUCLEAR PHYSICS A, 1993, 564 (04) :473-490

[9] CHARGE-EXCHANGE IN THE FINAL-STATE OF DIRECT (GAMMA,N) REACTIONS [J].

BOFFI, S ;

CAPUZZI, F ;

GIUSTI, C ;

PACATI, FD .

NUCLEAR PHYSICS A, 1985, 436 (03) :438-444

[10]

BOFFI S, 1986, 1986 P CEBAF SUMM WO, P133

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