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Polarized proton capture reaction /sup 7/Li(p,. gamma. )/sup 8/Be in the energy range from 380 to 960 keV

Journal Article:

Abstract

The polarized proton capture in /sup 7/Li was used to study the reaction mechanism and to obtain spectroscopic information on the /sup 8/Be nucleus. Gamma-ray angular distributions of the analyzing power were measured as a function of proton energy from Esub(p) = 380-960 keV with three Ge(Li) detectors simultaneously. The excitation functions of the cross section and the analyzing power are strongly energy dependent. The data were analyzed unambiguously and represented by three R-matrix elements, two M1 and one E1. The energy dependence of the two M1 matrix elements agrees with the well-known two 1/sup +/ resonances at Esub(x) = 17.642 and 18.157 MeV. The energy dependence of the E1 matrix element shows a smooth background presumably caused by a direct-capture mechanism, and furthermore, a resonant contribution, which is a significant suggestion of a new 1/sup -/ state in the /sup 8/Be system at Esub(x) = 17.70 MeV with a width of GAMMAsub(p) = 180 keV.
Authors:
Ulbricht, J; Arnold, W; Berg, H; Huttel, E; Krause, H H; Clausnitzer, G [1] 
  1. Giessen Univ. (Germany, F.R.). Abt. Grossgeraete (Angewandte Kernphysik)
Publication Date:
Sep 05, 1977
Product Type:
Journal Article
Reference Number:
AIX-09-354273; EDB-78-040902
Resource Relation:
Journal Name: Nucl. Phys., A; (Netherlands); Journal Volume: 287:2
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; LITHIUM 7 TARGET; PROTON REACTIONS; CAPTURE; ANGULAR DISTRIBUTION; BERYLLIUM 8; ENERGY DEPENDENCE; ENERGY LEVELS; EXCITATION FUNCTIONS; GAMMA RADIATION; KEV RANGE 100-1000; LEVEL WIDTHS; MATRIX ELEMENTS; PARITY; POLARIZED BEAMS; R MATRIX; SPIN; ALKALINE EARTH ISOTOPES; ALPHA DECAY RADIOISOTOPES; ANGULAR MOMENTUM; BARYON REACTIONS; BEAMS; BERYLLIUM ISOTOPES; CHARGED-PARTICLE REACTIONS; CROSS SECTIONS; DISTRIBUTION; ELECTROMAGNETIC RADIATION; ENERGY RANGE; EVEN-EVEN NUCLEI; HADRON REACTIONS; IONIZING RADIATIONS; ISOTOPES; KEV RANGE; LIGHT NUCLEI; MATRICES; NUCLEAR REACTIONS; NUCLEI; NUCLEON REACTIONS; PARTICLE PROPERTIES; RADIATIONS; RADIOISOTOPES; SECONDS LIVING RADIOISOTOPES; TARGETS; 651315* - Nuclear Properties & Reactions, A=6-19, Theoretical- Nuclear Reactions & Scattering- (-1987)
OSTI ID:
5327440
Country of Origin:
Netherlands
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: NUPAB
Submitting Site:
INIS
Size:
Pages: 220-236
Announcement Date:

Journal Article:

Citation Formats

Ulbricht, J, Arnold, W, Berg, H, Huttel, E, Krause, H H, and Clausnitzer, G. Polarized proton capture reaction /sup 7/Li(p,. gamma. )/sup 8/Be in the energy range from 380 to 960 keV. Netherlands: N. p., 1977. Web.
Ulbricht, J, Arnold, W, Berg, H, Huttel, E, Krause, H H, & Clausnitzer, G. Polarized proton capture reaction /sup 7/Li(p,. gamma. )/sup 8/Be in the energy range from 380 to 960 keV. Netherlands.
Ulbricht, J, Arnold, W, Berg, H, Huttel, E, Krause, H H, and Clausnitzer, G. 1977. "Polarized proton capture reaction /sup 7/Li(p,. gamma. )/sup 8/Be in the energy range from 380 to 960 keV." Netherlands.
@misc{etde_5327440,
title = {Polarized proton capture reaction /sup 7/Li(p,. gamma. )/sup 8/Be in the energy range from 380 to 960 keV}
author = {Ulbricht, J, Arnold, W, Berg, H, Huttel, E, Krause, H H, and Clausnitzer, G}
abstractNote = {The polarized proton capture in /sup 7/Li was used to study the reaction mechanism and to obtain spectroscopic information on the /sup 8/Be nucleus. Gamma-ray angular distributions of the analyzing power were measured as a function of proton energy from Esub(p) = 380-960 keV with three Ge(Li) detectors simultaneously. The excitation functions of the cross section and the analyzing power are strongly energy dependent. The data were analyzed unambiguously and represented by three R-matrix elements, two M1 and one E1. The energy dependence of the two M1 matrix elements agrees with the well-known two 1/sup +/ resonances at Esub(x) = 17.642 and 18.157 MeV. The energy dependence of the E1 matrix element shows a smooth background presumably caused by a direct-capture mechanism, and furthermore, a resonant contribution, which is a significant suggestion of a new 1/sup -/ state in the /sup 8/Be system at Esub(x) = 17.70 MeV with a width of GAMMAsub(p) = 180 keV.}
journal = {Nucl. Phys., A; (Netherlands)}
volume = {287:2}
journal type = {AC}
place = {Netherlands}
year = {1977}
month = {Sep}
}