Proton radioactivity of medium heavy nuclei

Conference · Thu Dec 10 00:00:00 EST 1987 · AIP Conf. Proc.; (United States)

OSTI ID:5337371

Faestermann, T; Gillitzer, A; Hartel, K; Kienle, P; Nolte, E

For the proton radioactive nuclei /sup 109/I and /sup 113/Cs with decay energies of 0.83 MeV and 0.98 MeV the halflives have been measured as 109(17) ..mu..s and 33(7) ..mu..s respectively. These halflives are compared with calculations using the WKB approximation. The spectroscopic factors deduced are an order of magnitude smaller than expected for a pure d/sub 5/2/ single particle state of the emitter. For /sup 105/Sb a negative proton binding energy of B/sub P/ = -0.36(20) MeV could be established, but no proton radioactivity with T/sub 1/2/greater than or equal to10 ns and E/sub P/greater than or equal to0.5 MeV has been observed down to a cross section of 0.5 ..mu..b. In a search for proton radioactivity of /sup 108/I producd with the /sup 54/Fe(/sup 58/Ni,p3n) reaction no new proton line was found. But the cross section limit of 5 ..mu..b reached cannot definitely rule out this possibility. With the reaction /sup 40/Ca(/sup 40/Ca,p2n)/sup 77/Y direct proton emission was searched for in this region of well deformed nuclei. Assuming an L = 4 proton emission decay energies between 0.45 MeV and 0.90 MeV can be excluded.

• Research Organization: Technische Universitaet Muenchen, D8046 Garching, FRG
• OSTI ID: 5337371
• Report Number(s): CONF-870970-; TRN: 88-012597
• Journal Information: AIP Conf. Proc.; (United States), Vol. 164:1; Conference: 5. international conference on nuclei far from stability, Lake Rosseau, Canada, 14 Sep 1987
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CALCIUM 40 REACTIONS
HEAVY ION FUSION REACTIONS
CALCIUM 40 TARGET
CESIUM 113
HALF-LIFE
SPECTROSCOPIC FACTORS
IODINE 109
YTTRIUM ISOTOPES
PROTON EMISSION DECAY
EXPERIMENTAL DATA
NEUTRON-DEFICIENT ISOTOPES
NUCLEONS
THEORETICAL DATA
WKB APPROXIMATION
ALKALI METAL ISOTOPES
BARYONS
CESIUM ISOTOPES
CHARGED-PARTICLE REACTIONS
DATA
DECAY
ELEMENTARY PARTICLES
FERMIONS
HADRONS
HEAVY ION REACTIONS
INFORMATION
INTERMEDIATE MASS NUCLEI
IODINE ISOTOPES
ISOTOPES
NANOSEC LIVING RADIOISOTOPES
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
PROTON DECAY RADIOISOTOPES
RADIOISOTOPES
TARGETS
651720* - Nuclear Properties & Reactions
A=90-149
Experimental