Studies of Rare Earth Alpha Emitters

Studies of Rare Earth Alpha Emitters

A series of bombardments using alpha particles from the Berkeley 60-inch cyclotron on rare earth oxides has resulted in the discovery and mass assignment of two new alpha-emitting isotopes, Dy/sup 153/(5 hr) and Dy/sup 154/ (13 hr). Mass assignanents have been made for two other alpha emitters, Dy/s...

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Veröffentlicht in:Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, 1958-01, Vol.109 (1), p.121-125
Hauptverfasser: Toth, Kenneth S., Rasmussen, John O.
Format: Artikel
Sprache:eng
Schlagworte:
ALPHA BEAMS
ALPHA PARTICLES
CYCLOTRONS
DYSPROSIUM 149
DYSPROSIUM 152
DYSPROSIUM 153
DYSPROSIUM 154
DYSPROSIUM 155
EMISSION
ENERGY RANGE
INTERNAL CONVERSION
IRRADIATION
NITROGEN 14
NUCLEAR REACTIONS
OXIDES
PHYSICS
PRASEODYMIUM
QUANTITATIVE ANALYSIS
RARE EARTHS
TERBIUM 151
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Zusammenfassung:A series of bombardments using alpha particles from the Berkeley 60-inch cyclotron on rare earth oxides has resulted in the discovery and mass assignment of two new alpha-emitting isotopes, Dy/sup 153/(5 hr) and Dy/sup 154/ (13 hr). Mass assignanents have been made for two other alpha emitters, Dy/sup 154// (2.3 hr) and Tb/sup 151/ (19 hr). A new 10-hr electroncapture isotope has been identified as Dy/sup 155/. Evidence is also presented for the discovery of another isotope,Dy/sup 149/ (8 min), which was produced by a N/sup 14/ ion bombardment on praseodymium. (auth)
ISSN:0031-899X
DOI:10.1103/PhysRev.109.121