Proton states in /sup 247/Bk excited by /sup 246/Cm(. cap alpha. ,t) reaction and /sup 247/Cf(electron capture) and /sup 251/Es(. cap alpha. ) decays

Journal Article · Sun Jul 01 00:00:00 EDT 1979 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.20.290· OSTI ID:5986518

Ahmad, I; Yates, S W; Sjoblom, R K; Friedman, A

Proton states in /sup 247/Bk have been investigated by measuring the ..gamma.. rays and conversion electrons associated with the electron capture decay of the 3.11-h /sup 247/Cf, /sup 251/Es ..cap alpha.. spectrum, and triton spectrum produced in the /sup 246/Cm(..cap alpha..,t)/sup 247/Bk reaction. The ..gamma..-ray spectra were measured with a 25-cm/sup 3/ coaxial Ge(Li) diode and the electron spectrum was measured with a cooled Si(Li) spectrometer. Multipolarities of the intense transitions in /sup 247/Bk were deduced and the logft values were derived from measured electron capture intensities. Triton spectra from the /sup 246/Cm(..cap alpha..,t) reaction at bombarding energies of 28.0 and 29.0 MeV were momentum analyzed with an Enge split-pole magnetic spectrograph. Spectroscopic factors were derived from the measured cross sections and were found to be in good agreement with respective values calculated with single-particle wave functions. The /sup 251/Es ..cap alpha.. spectrum was measured with the Argonne double-focussing magnetic spectrometer; five ..cap alpha.. groups were observed. On the basis of the results of the present investigation the following proton orbitals were identified in /sup 247/Bk: 3/2-(521), 0; 7/2+(633), 40.8; 5/2+(642), 334.9; 5/2-(523), 447.8; 1/2+(400), 487; 1/2-(521), 704; I = 9/2,7/2-(514), 904; and I = 13/2,9/2+(624), 1166 keV.

• Research Organization: Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439
• OSTI ID: 5986518
• Journal Information: Phys. Rev., C; (United States), Vol. 20:1
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BERKELIUM 247
ENERGY LEVELS
ALPHA REACTIONS
STRIPPING
CURIUM 246 TARGET
CALIFORNIUM 247
ELECTRON CAPTURE DECAY
EINSTEINIUM 251
ALPHA DECAY
MULTIPOLE TRANSITIONS
PROTONS
SINGLE-PARTICLE MODEL
MEV RANGE 10-100
ONE-NUCLEON TRANSFER REACTIONS
TRITONS
GAMMA SPECTRA
SPECTROSCOPIC FACTORS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
BARYONS
BERKELIUM ISOTOPES
BETA DECAY
BETA DECAY RADIOISOTOPES
CALIFORNIUM ISOTOPES
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
DAYS LIVING RADIOISOTOPES
DECAY
DIRECT REACTIONS
EINSTEINIUM ISOTOPES
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EVEN-ODD NUCLEI
FERMIONS
HADRONS
HEAVY NUCLEI
HOURS LIVING RADIOISOTOPES
ISOTOPES
MEV RANGE
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
ODD-EVEN NUCLEI
RADIOISOTOPES
SPECTRA
TARGETS
TRANSFER REACTIONS
YEARS LIVING RADIOISOTOPES
652022* - Nuclear Properties & Reactions
A=220 & above
Experimental- Radioactive Decay- (-1987)
652023 - Nuclear Properties & Reactions
A=220 & above
Experimental- Energy Levels & Transitions- (-1987)
652025 - Nuclear Properties & Reactions
A=220 & above
Experimental- Nuclear Reactions & Scattering- (-1987)