Absolute measurement of the sup 65 Cu(n,2n) sup 64 Cu, sup 64 Zn (n,p) sup 64 Cu and sup 56 Fe(n,p) sup 56 Mn cross sections at 14. 6 MeV

Thesis/Dissertation · Fri Jan 01 00:00:00 EST 1988

OSTI ID:5665723

Zasadny, K R

The {sup 65}Cu(n,2n){sup 64}Cu and {sup 64}Zn(n,p){sup 64}Cu cross sections are measured relative to the {sup 56}Fe(n,p){sup 56}Mn cross section by the activation method. The {sup 56}Fe(n,p){sup 56}Mn cross section is then measured relative to an absolutely calibrated neutron flux monitor. Neutrons are produced by a 150 kV Cockroft-Walton accelerator using the {sup 3}H(d,n){sup 4}He reaction. Measurements are conducted under low-scatter conditions at 0{degree} with respect to the incident deuteron beam direction. Measurement of the induced {sup 64}Cu activity is conducted by positron absorption and annihilation in copper. Annihilation photons are counted in two 7.6 cm {times} 7.6 cm NaI(Tl) detectors, where the counting geometry takes advantage of the angular correlation of the emitted photons. Absolute efficiency of this counting system is determined by a {sup 22}Na standard activity. The {sup 22}Na absolute source activity is determined by {beta}{sup +}-{gamma} ray coincidence counting. Induced {sup 56}Mn activity is measured by 4{kappa}{beta}{sup {minus}} counting in a gas-flow proportional counter. Absolute efficiency of this counter is determined by 4{kappa}{beta}-{gamma} coincidence counting techniques. In all measurements, the time-dependence of the neutron flux is monitored by a standard BF{sub 3} long counter in multichannel scaling mode. Absolute measurement of the neutron flux is conduced by the Dual-Thin Scintillator (DTS) detector developed at the National Bureau of Standards (NBS). Absolute efficiency of the DTS detector is measured at NBS by the time-correlated associated alpha particle technique. The calibration agrees with efficiency determined by a Monte Carlo simulation of the detector response.

• Research Organization: Michigan Univ., Ann Arbor, MI (USA)
• OSTI ID: 5665723
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COPPER 65 TARGET
NEUTRON REACTIONS
IRON 56 TARGET
CHARGE-EXCHANGE REACTIONS
QUASI-ELASTIC SCATTERING
ZINC 64 TARGET
ACTIVITY LEVELS
ANNIHILATION
COINCIDENCE METHODS
COPPER 64
CROSS SECTIONS
EXPERIMENTAL DATA
MANGANESE 56
MEV RANGE 10-100
MONTE CARLO METHOD
NAI DETECTORS
NEUTRON FLUX
NEUTRON MONITORS
NEUTRONS
PHOTONS
PROPORTIONAL COUNTERS
BARYON REACTIONS
BARYONS
BASIC INTERACTIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
COPPER ISOTOPES
COUNTING TECHNIQUES
DATA
DIRECT REACTIONS
ELECTROMAGNETIC INTERACTIONS
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
HADRON REACTIONS
HADRONS
HOURS LIVING RADIOISOTOPES
INFORMATION
INTERACTIONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
MANGANESE ISOTOPES
MASSLESS PARTICLES
MEASURING INSTRUMENTS
MEV RANGE
MONITORS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
NUMERICAL DATA
ODD-ODD NUCLEI
QUASI-FREE REACTIONS
RADIATION DETECTORS
RADIATION FLUX
RADIATION MONITORS
RADIOISOTOPES
SCATTERING
SCINTILLATION COUNTERS
SOLID SCINTILLATION DETECTORS
TARGETS
651620* - Nuclear Properties & Reactions
A=59-89
Experimental