INVESTIGATIONS ON ANGULAR CORRELATION AND EXCITED STATES OF FISSION FRAGMENTS
Thesis/Dissertation
·
OSTI ID:4776213
Angular correlations between fission fragments and associated gamma rays emitted with haif lives up to microseconds from thermal neutron fission of U/sup 235/ are investigated, and the possible excited states of the fragments that emit these gamma rays are looked for. It is questioned whether there is only one fission fragment corresponding to the particular gamma energy chosen, in which case, the experiment could lead to direct evidence of the excited levels of that fragment. A gridded double ionization chamber is used for the measurements, utilizing an electronic technique capable of providing required parameters with accuracy and good statistics in a short time. A gamma energy is selected and the fission fragments coming in coincidence with this forward-moving gamma ray are studied. Corresponding angular distributions and most probable mass ratios are determined. It is found that the graphs of angular correlation are isotropic, There is a most probable mass ratio for each gamma ray observed, from which individual masses giving this ratio can be calculated. It is observed that there is more than one pair of fragments for each gamma ray. However, since the resolving power and the efficiency of the detector are low, some other neighboring gamma ray might be picked up. Hence, only the most probable masses of the fragments for the gamma ray chosen can be determined, and it is not possible to identify any element or its excited states. Kinetic energy data are determined. (Dissertation Abstr., 22: No. 7, 1982.)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-17-000877
- OSTI ID:
- 4776213
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
Similar Records
Charge and angular distributions as well as sequential decay and. gamma. -ray emission in heavy ion collisions viewed in the light of the diffusion model
FISSION FRAGMENT VELOCITY DISTRIBUTION AND COINCIDENT GAMMA SPECTRA FOR Cf$sup 25$$sup 2$
THE ANGULAR DISTRIBUTIONS OF LIGHT AND HEAVY FRAGMENTS FROM THE 14 Mev NEUTRON FISSION OF U$sup 23$$sup 8$
Conference
·
Mon Aug 01 00:00:00 EDT 1977
·
OSTI ID:7081896
FISSION FRAGMENT VELOCITY DISTRIBUTION AND COINCIDENT GAMMA SPECTRA FOR Cf$sup 25$$sup 2$
Technical Report
·
Fri Oct 30 23:00:00 EST 1959
·
OSTI ID:4258405
THE ANGULAR DISTRIBUTIONS OF LIGHT AND HEAVY FRAGMENTS FROM THE 14 Mev NEUTRON FISSION OF U$sup 23$$sup 8$
Journal Article
·
Tue Dec 31 23:00:00 EST 1957
· Atomnaya Energiya
·
OSTI ID:4351159