STATISTICAL AND NONSTATISTICAL NEUTRON DECAY OF THE GIANT ELECTRIC-DIPOLE RESONANCE OF PB-208

被引:13
作者
ALARCON, R [1 ]
COLE, PL [1 ]
DALE, DS [1 ]
DEBEVEC, PT [1 ]
MORFORD, LJ [1 ]
机构
[1] UNIV ILLINOIS, DEPT PHYS, CHAMPAIGN, IL 61820 USA
来源
PHYSICAL REVIEW C | 1991年 / 43卷 / 06期
关键词
D O I
10.1103/PhysRevC.43.R2470
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 neutron decay of the giant electric dipole resonance of Pb-208 has been determined by a measurement of the differential cross section, d-sigma(E-gamma, E(n)/dE(n), of the Pb-208(gamma,n) reaction for 20 contiguous photon energy bands between 11.2 and 15.7 MeV. The statistical component of the decay was calculated in the Hauser-Feshbach formalism. A nonstatistical component of the decay to low-lying hole states is unambiguously identified. The magnitude of this component is strongly energy dependent.
引用
收藏
页码:R2470 / R2473
页数:4
相关论文
共 19 条
[1]   FINE-STRUCTURE IN THE PB-280 PHOTO-NEUTRON CROSS-SECTION BETWEEN 9.9 AND 11.2 MEV [J].
BELL, ZW ;
CARDMAN, LS ;
AXEL, P .
PHYSICAL REVIEW C, 1982, 25 (02) :791-803
[2]   NEUTRON DECAY FROM THE GIANT-RESONANCE REGION IN PB-208 [J].
BRACCO, A ;
BEENE, JR ;
BERTRAND, FE ;
HALBERT, ML ;
HENSLEY, DC ;
AUBLE, RL ;
HOREN, DJ ;
ROBINSON, RL ;
SAYER, RO .
PHYSICAL REVIEW C, 1989, 39 (02) :725-728
[3]   STUDY OF THE BREATHING MODE OF PB-208 THROUGH NEUTRON DECAY [J].
BRACCO, A ;
BEENE, JR ;
VANGIAI, N ;
BORTIGNON, PF ;
ZARDI, F ;
BROGLIA, RA .
PHYSICAL REVIEW LETTERS, 1988, 60 (25) :2603-2606
[4]   EVIDENCE FOR A (SEMI)DIRECT COMPONENT IN THE DECAY OF THE ISOSCALAR GIANT MONOPOLE IN PB-208 [J].
BRANDENBURG, S ;
BORGHOLS, WTA ;
DRENTJE, AG ;
VANDERWOUDE, A ;
HARAKEH, MN ;
EKSTROM, LP ;
HAKANSON, A ;
NILSSON, L ;
OLSSON, N ;
DELEO, R .
PHYSICAL REVIEW C, 1989, 39 (06) :2448-2451
[5]  
CALARCO JR, 1969, THESIS U ILLINOIS
[6]   STATISTICAL DECAY OF GIANT-RESONANCES [J].
DIAS, H ;
TERUYA, N ;
WOLYNEC, E .
PHYSICAL REVIEW C, 1986, 33 (06) :1955-1960
[7]   LEVEL DENSITY PARAMETERS FOR BACK-SHIFTED FERMI GAS MODEL IN MASS RANGE 40 LESS-THAN A LESS-THAN 250 [J].
DILG, W ;
SCHANTL, W ;
VONACH, H ;
UHL, M .
NUCLEAR PHYSICS A, 1973, A217 (02) :269-298
[8]   DIRECT DECAY COMPONENT OF THE GIANT-MONOPOLE-RESONANCE REGION IN PB-208 [J].
EYRICH, W ;
FUCHS, K ;
HOFMANN, A ;
SCHEIB, U ;
STEUER, H ;
REBEL, H .
PHYSICAL REVIEW C, 1984, 29 (02) :418-424
[9]  
Fu C. Y., 1975, Atomic Data and Nuclear Data Tables, V16, P409, DOI 10.1016/0092-640X(75)90020-0
[10]   THE INELASTIC SCATTERING OF NEUTRONS [J].
HAUSER, W ;
FESHBACH, H .
PHYSICAL REVIEW, 1952, 87 (02) :366-373