Evidence for collectivity in the light Po isotopes: The {alpha}-decay of {sup 190}Po

Conference · Wed Dec 31 04:00:00 EST 1997

OSTI ID:560245

Batchelder, J C ^[1]

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1. Oak Ridge Associated Univ., TN (United States)

The {alpha}-decay properties of {sup 190}Po were investigated through the use of a fragment mass analyzer in conjunction with a double-sided Si strip detector. The isotope was produced via the {sup 96}Mo({sup 96}Mo,2n) reaction, and its {alpha}-decay energy and T{sub {1/2}} were measured as 7529(15) keV and 2.4{sub -0.3} {sup +0.4} ms respectively. The resulting reduced width is nearly identical to that of the {sup 192,194}Po isotopes. This is believed to result from significant mixing between the ground state {pi}(2p) and the low-lying O{sup +} {pi}(4p-2h) intruder state in the Po parent. This provides further evidence for collectivity in the light Po isotopes. In addition, {sup 191}Po was unambiguously identified and the {sup 186}Pb {alpha}-decay branch was determined experimentally for the first time.

• DOE Contract Number: AC05-76OR00033
• OSTI ID: 560245
• Report Number(s): CONF-970443--
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ALPHA DECAY
LEAD 186
MIXING
MOLYBDENUM 96
POLONIUM