Radioactive targets for nuclear astrophysics research at LANSCE
During the past few years we have made measurements of (n,p) and (n,{alpha}) cross sections on several radioactive nuclei of importance to nuclear astrophysics. The measurements were made at the Manuel Lujan, Jr., Neutron Scattering Center (LANSCE) from thermal neutron energy to approximately 100 keV. Successful measurements have been completed on the radioisotopes {sup 7}Be, {sup 22}Na and {sup 36}Cl while preliminary data have been taken on targets of {sup 54}Mn and {sup 55}Fe. Similar measurements have also been made on the stable isotopes {sup 14}N, {sup 17}O and {sup 35}Cl. We are currently assembling a 4{pi} barium fluoride (BaF{sub 2}) detector which will allow us to expand our program to (n,{gamma}) measurements. The (n,{gamma}) (and in some cases future (n,p)) measurements will require targets with higher specific activity and greater chemical purity than we have so far been able to use. We discuss the fabrication techniques used for the samples produced so far, the requirements the future (n,{gamma}) targets must meet and our current plans for producing them, and the physics motivations for the measurements.
- Research Organization:
- Los Alamos National Lab., NM (USA)
- Sponsoring Organization:
- DOE/AD
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6609478
- Report Number(s):
- LA-UR-90-3072; CONF-9009161-1; ON: DE91000426; TRN: 91-000236
- Resource Relation:
- Conference: 15. world conference of the International Nuclear Target Development Society: special high-purity materials and targets, Santa Fe, NM (USA), 10-14 Sep 1990
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
RADIOISOTOPES
NEUTRON REACTIONS
ASTROPHYSICS
CROSS SECTIONS
GAMMA DETECTION
NEUTRON DETECTION
NEUTRON SOURCES
NUCLEOSYNTHESIS
TARGETS
BARYON REACTIONS
DETECTION
HADRON REACTIONS
ISOTOPES
NUCLEAR REACTIONS
NUCLEON REACTIONS
PARTICLE SOURCES
RADIATION DETECTION
RADIATION SOURCES
SYNTHESIS
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources
651000 - Nuclear Physics