RESONANCE ABSORPTION OF GAMMA RAYS IN NORMAL AND SUPERCONDUCTING TIN

Journal Article · Sat Sep 15 04:00:00 EDT 1962 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.127.2028· OSTI ID:4777899

Yaqub, M; Hohenemser, C

A study of the resonant absorption of 23.8-kev gamma rays in Sn/sup 119/ is made between 373 and 1.1 deg K by uslng the Sb/sup 119/ K-capture parent. The source is prepared by bombarding natural Sn with 10-Mev deuterons in a cyclotron, and is thick enough to absorb resonantly a large portion of the recoilless photons emitted. By studying the self-absorption in this source between 373 and 60 deg K and taking into account the contributions to the intensity arising from resonant scattering, an average value of the Debye temperature theta is derived. In order to see if the phonon spectrum undergoes a change in passing from the superconducting to the normal phase, the counting rate is measured at several temperatures between 4.2 and 1.1 deg K, with and without a magnetic field strong enough to destroy the superconductivity of the source. Using the derived value of 140 deg K for THETA , it is concluded that the change in THETA between the two phases cannot be more than O.76 deg K. (auth)

• Research Organization: Washington Univ., St. Louis
• NSA Number: NSA-16-033895
• OSTI ID: 4777899
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 127; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ABSORPTION
CYCLOTRONS
DEBYE TEMPERATURE
DEUTERONS
ENERGY RANGE
GAMMA RADIATION
IRRADIATION
LATTICES
LOW TEMPERATURE
MAGNETIC FIELDS
OSCILLATIONS
PHONONS
PHYSICS
RESONANCE
SPECTRA
SUPERCONDUCTIVITY
TEMPERATURE
THERMAL RADIATION
TIN
TIN 119
VARIATIONS