Measurement of neutron activation cross sections of energy up to 40 MeV using semimonoenergetic p-Be neutrons
- Univ. of Tokyo, Inst. for Nuclear Study, 3-2-1, Midori-cho, Tanashi, Tokyo 188 (JP)
- Tohoku Univ., Cyclotron and Radioisotope Center, Aoba, Aramaki, Aoba-ku, Sendai 980 (JP)
This paper discusses an intense semimonoenergetic neutron field which was made using a simple beryllium target system bombarded by protons of nine different energies between 20 and 40 MeV. Natural sodium, aluminum, vanadium, chromium, manganese, copper, zinc, and gold samples were irradiated at this field, and gamma rays from the samples were observed by a germanium detector. The production rates of 17 radionuclides were obtained for the nine different neutron fields, and the excitation functions of these 17 reaction channels of {sup 23}Na(n,2n){sup 22}Na, {sup 27}Al(n,{alpha}){sup 24}Na, {sup 51}V(n,{alpha}){sup 48}Sc, {sup 51}V(n,p){sup 51}Ti, {sup 50}Cr(n,3n){sup 48}Cr, {sup 50}Cr(n,2n){sup 49}Cr, {sup 55}Mn(n,p{alpha}){sup 51}Ti, {sup 55}Mn(n,4n){sup 52}Mn, {sup 55}Mn(n,2n){sup 54}Mn, {sup 63}Cu(n,3n){sup 61}Cu, {sup 63}Cu(n,2n){sup 62}Cu, {sup 65}Cu(n,p){sup 65}Ni, {sup 64}Zn(n,t){sup 62}Cu, {sup 64}Zn(n,3n){sup 62}Zn, {sup 64}Zn(n,2n){sup 63}Zn, {sup 197}Au(n,4n){sup 194}Au, and {sup 197}Au(n,2n){sup 196}Au were obtained for neutron energies up to 40 MeV by using the SAND-II and the NEUPAC unfolding codes and also least-squares fitting. The initial guess value for these methods was obtained primarily from calculations of the ALICE/LIVERMORE82 code.
- OSTI ID:
- 7026903
- Journal Information:
- Nuclear Science and Engineering; (United States), Journal Name: Nuclear Science and Engineering; (United States) Vol. 111:4; ISSN 0029-5639; ISSN NSENA
- Country of Publication:
- United States
- Language:
- English
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
A CODES
ALKALI METALS
ALKALINE EARTH METALS
ALUMINIUM
BARYON REACTIONS
BARYONS
BERYLLIUM
CHARGED-PARTICLE REACTIONS
CHROMIUM
COMPUTER CODES
COPPER
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
FERMIONS
GAMMA RADIATION
GOLD
HADRON REACTIONS
HADRONS
IONIZING RADIATIONS
ISOTOPES
L CODES
MAGNESIUM
METALS
MEV RANGE
MEV RANGE 10-100
NEUTRON REACTIONS
NEUTRONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEONS
PRODUCTION
PROTON REACTIONS
RADIATIONS
RADIOISOTOPES
S CODES
SODIUM
TARGETS
TRANSITION ELEMENTS
VANADIUM
ZINC