{sup 149}Sm(n,{alpha}){sup 146}Nd Cross Sections in the MeV Region

Journal Article · Fri Dec 16 04:00:00 EST 2011 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.107.252502· OSTI ID:21612561

Guohui, Zhang; Jiaming, Liu; Xiang, Liu; Jinhua, Han; Jinxiang, Chen ^[1]; Gledenov, Yu M; Sedysheva, M V; Voronov, Yu N ^[2]; Khuukhenkhuu, G ^[3]; Szalanski, P J ^[4]; Koehler, P E ^[5]

---

1. State Key Laboratory of Nuclear Physics and Technology, Institute of Heavy Ion Physics, Peking University, Beijing 100871 (China)
2. Frank Laboratory of Neutron Physics, JINR, Dubna 141980 (Russian Federation)
3. Nuclear research Centre, National University of Mongolia, Ulaanbaatar (Mongolia)
4. University of Lodz, Institute of Physics, Lodz (Poland)
5. Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)

We have measured the {sup 149}Sm(n,{alpha}){sup 146}Nd cross section at 4.5, 5.0, 5.5, 6.0, and 6.5 MeV. Measurements were performed at the 4.5 MV Van de Graaff accelerator of Peking University with monoenergetic neutrons produced via the {sup 2}H(d,n){sup 3}He reaction using a deuterium gas target. Alpha particles were detected with a double-section gridded ionization chamber having two back-to-back {sup 149}Sm{sub 2}O{sub 3} samples attached to the common cathode. Absolute neutron flux was measured using a small {sup 238}U fission chamber and monitored by a BF{sub 3} long counter. These are the first reported cross sections for this reaction at these energies, except at 6.0 eV, where our new data are in good agreement with our earlier result. The present results help to much better constrain the {sup 149}Sm(n,{alpha}){sup 146}Nd cross section in a region where its energy dependence is changing fairly rapidly and there are large differences between evaluated nuclear data libraries.

• OSTI ID: 21612561
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 25 Vol. 107; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
ALPHA PARTICLES
BARYON REACTIONS
BARYONS
CATHODES
CHALCOGENIDES
CHARGED PARTICLES
CROSS SECTIONS
DEUTERIUM
DEUTERIUM TARGET
ELECTRODES
ELECTROSTATIC ACCELERATORS
ELEMENTARY PARTICLES
ENERGY DEPENDENCE
ENERGY RANGE
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FERMIONS
FISSION CHAMBERS
HADRON REACTIONS
HADRONS
HEAVY NUCLEI
HELIUM 3
HELIUM ISOTOPES
HYDROGEN ISOTOPES
INTERMEDIATE MASS NUCLEI
IONIZATION CHAMBERS
IONIZING RADIATIONS
ISOTOPES
LIGHT NUCLEI
LONG COUNTERS
MEASURING INSTRUMENTS
MEV RANGE
MEV RANGE 01-10
MODERATING DETECTORS
NEODYMIUM 146
NEODYMIUM ISOTOPES
NEUTRON DETECTORS
NEUTRON FLUX
NEUTRON REACTIONS
NEUTRONS
NUCLEAR DATA COLLECTIONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
ODD-ODD NUCLEI
OXIDES
OXYGEN COMPOUNDS
RADIATION DETECTORS
RADIATION FLUX
RADIATIONS
RADIOISOTOPES
RARE EARTH COMPOUNDS
RARE EARTH NUCLEI
SAMARIUM 149
SAMARIUM 149 TARGET
SAMARIUM COMPOUNDS
SAMARIUM ISOTOPES
SAMARIUM OXIDES
SPONTANEOUS FISSION RADIOISOTOPES
STABLE ISOTOPES
TARGETS
URANIUM 238
URANIUM ISOTOPES
VAN DE GRAAFF ACCELERATORS
YEARS LIVING RADIOISOTOPES