THE RATIO L/K FOR Dy$sup 159$ AND Er$sup 165$ AND EVALUATION OF ENERGY TRANSITIONS Dy$sup 159$ $Yields$ Tb$sup 159$ AND Er$sup 165$ $Yields$ Ho$sup 16$$sup 5$

Journal Article · Tue Jul 01 04:00:00 EDT 1958 · Izvest. Akad. Nauk S.S.S.R. Ser. Fiz.

OSTI ID:4279825

Grigor'ev, O I; Kuznetsov, B S; Shimanskaya, N S; Yutlandov, I A

Various methods for determining the decay energy of isotopes subjected to electron capture are discussed. The method of L/K was found tc be suitable for small energy transitions (< 200 kev) of isotopes with relatively simple decay schemes and having no strong cascade gamma radiation. The method has limitations due to incomplete K-capture theory and incomplete data on quantitative and qualitative regularities in the atomic shell electron reconstruction process. The L/K ratio was determined for two neutron-deficient isotopes, Dy/sup 159/ and Er/sup 165/,on the basis of the transition energy values of Dy/sup 159/ yields Tb/sup 159/ and Er/sup 165/ yields Ho/sup 165/. The design and performance of the gamma spectrometer with proportional counter used for measuring the L and K radiation are described. The decay schemes of Er/ sup 165/ and Dy/sup 159/ and levels of Tb/sup 159/ are presented. The decay energy of Dy/sup 159/ and Er/sup 165/ was less than 100 kev; consequently, the L/ K ratio method produced satisfactory results. (R.V.J.)

• Research Organization: Khlopin Radium Inst., Academy of Sciences, USSR
• NSA Number: NSA-13-005032
• OSTI ID: 4279825
• Journal Information: Izvest. Akad. Nauk S.S.S.R. Ser. Fiz., Journal Name: Izvest. Akad. Nauk S.S.S.R. Ser. Fiz. Vol. Vol: 22
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ATOMS
BRANCHING RATIO
CAPTURE
DECAY
DYSPROSIUM 159
ELECTRONS
ENERGY
ENERGY LEVELS
ERBIUM 165
GAMMA RADIATION
GAMMA SPECTROMETERS
HOLMIUM 165
INTERNAL CONVERSION
K-CAPTURE
L-CAPTURE
MEASURED VALUES
NEUTRONS
NUCLEAR THEORY
PHYSICS AND MATHEMATICS
PROPORTIONAL COUNTERS
TERBIUM 159