THE THRESHOLD ANOMALY IN THE O-16+NI-58,NI-60,NI-62,NI-64 SYSTEMS

被引：43

作者：

KEELEY, N

CHRISTLEY, JA

CLARKE, NM

FULTON, BR

LILLEY, JS

NAGARAJAN, MA

THOMPSON, IJ

机构：

[1] UNIV BIRMINGHAM,SCH PHYS & SPACE RES,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND

[2] UNIV SURREY,DEPT PHYS,GUILDFORD GU2 5XH,SURREY,ENGLAND

[3] SERC,DARESBURY LAB,WARRINGTON WA4 4AD,CHESHIRE,ENGLAND

[4] IST NAZL FIS NUCL,LAB NAZL LEGNARO,I-35020 LEGNARO,ITALY

来源：

NUCLEAR PHYSICS A | 1995年 / 582卷 / 1-2期

关键词：

NI-58; NI-60; NI-62; NI-64((OO)-O-16-O-16); E; 60; 70; 80; 100; 120; MEV; MEASURED SIGMA(THETA); DOUBLE-FOLDING MODEL; DEDUCED OPTICAL MODEL PARAMETERS; COUPLED-REACTION-CHANNELS ANALYSIS;

D O I：

10.1016/0375-9474(94)00485-6

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：

Accurate angular distributions of O-16 ions scattered by Ni-58,Ni-60,Ni-62,Ni-64 have been measured at five energies between 60 and 120 MeV. An optical model analysis of these, together with existing data, indicates that, whereas there is a significant increase with A in the surface absorption, there is little, if any, isotopic dependence in the energy variation of the optical potentials, V(E) and W(E), near threshold (the threshold anomaly). Clear evidence is found for a hitherto unreported peak in W(E) just above threshold. CRC calculations, including inelastic excitation and transfer, reproduce the data but show no clear connection between the peak and a particular reaction channel.

引用

页码：314 / 334

页数：21

共 36 条

[1] ENERGY-DEPENDENT RENORMALIZATION COEFFICIENTS OF FOLDING-MODEL DESCRIPTION OF S-32+CA-40 ELASTIC-SCATTERING [J].