Heavy ion reactions were used to produce nuclei away from beta stability in the mass region A(TURNEQ)80. The irradiated targets were transported to an isolated detector site using a rapid target transfer (Rabbit) system to aid in the study of weak products produced in these reactions and to protect the Ge(Li) detectors used in the experiments. The "Rabbit" system constructed for this purpose was a pneumatic type and was controlled by a NIM controller. The NIM controller, a unique feature of this system, was constructed with TTL and CMOS circuits and works in conjunction with a leaky integrator and a UNIVAC 6130 computer. The "Rabbit" system was used in lifetime, gamma-gamma coincidence measurements and beta-gamma coincidence measurements. / Lifetime measurements were used to study the decay of ('79)Sr produced in the reaction ('54)Fe + ('28)Si at 90 MeV (lab). The lifetime of the ground state of ('79)Sr was measured and a positron feeding to the 39.3-keV level in ('79)Rb was established. Lifetime measurements were also used to study the decay of ('81m)Rb, which is produced in the reaction ('68)Zn + ('16)O at 56 MeV (lab). A positron feeding from the isomeric level in ('81)Rb to the 49.6-keV level in ('81)Kr was established. In addition, lifetime measurements were used to help identify gamma rays produced in the reactions ('68)Zn + ('16)O and ('70)Ge + ('16)O at 56 MeV (lab). / The reaction ('68)Zn + ('16)O was also studied with the gamma-gamma coincidence technique. Extensive level schemes were constructed and new levels were established for the decays of ('81)Rb and ('81)Sr. The beta-gamma coincidence technique was used in the study of the reaction ('70)Ge + ('16)O to investigate the ground state and isomeric levels of ('83)Y and ('84)Y. The order and relative separation of these levels were tentatively established for ('83)Y. The Q-value and J('(pi)) of the ground state were established and tentative J('(pi)) assignments were made for the isomeric levels in ('84)Y. / The information from these measurements as well as information previously known are then used to look for apparent systematics in a number of isotopes of Zr, Y, Sr, Rb and Kr. Possible explanations of these trends are given in terms of the spherical shell model. / Source: Dissertation Abstracts International, Volume: 42-01, Section: B, page: 0264. / Thesis (Ph.D.)--The Florida State University, 1981.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_74403 |
| Contributors | FRY, LEOLAN HAROLD, JR., Florida State University |
| Source Sets | Florida State University |
| Detected Language | English |
| Type | Text |
| Format | 243 p. |
| Rights | On campus use only. |
| Relation | Dissertation Abstracts International |
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