Published 2013 | Version v1
Journal article Metadata-only

Search for super-screening effects in a superconductor

Creators

  • 1. Vinca Institute of Nuclear Sciences, University of Belgrade, 11000 Belgrade, (Serbia)
  • 2. GANIL CEA/DSM-CNRS/IN2P3, Boulevard H. Becquerel, F-14076 Caen, (France)
  • 3. LPC/ENSICAEN, Boulevard du Marechal Juin, 14050 Caen Cedex, (France)
  • 4. Institut de Physique Nucleaire Universite Paris-Sud-11-CNRS/IN2P3, 91406 Orsay, (France)
  • 5. Horia Hulubei National Institute for Physics and Nuclear Engineering, PO Box MG-6, 76900 Bucharest, (Romania)
  • 6. CSNSM, Universite Paris-Sud-11 CNRS/IN2P3, 91405 Orsay-Campus, (France)
  • 7. CEA/DAM Ile-de-France, BP12, F-91680 Bruyeres-le-Chatel, (France)
  • 8. CRISMAT/ENSICAEN et Universite de Caen, CNRS UMR 6508, 14050 Caen, (France)

Description

The decay of 19O(β-) and 19Ne(β+) implanted in niobium in its superconducting and metallic phases was measured using purified radioactive beams produced by the SPIRAL GANIL facility. Half-lives and branching ratios measured in the two phases are consistent within a 1σ error bar. This measurement casts strong doubts on the predicted strong electron screening in a superconductor, the so-called super-screening. The measured difference in screening potential energy is 110(90) eV for 19Ne and 400(320) eV for 19O. Precise determinations of the half-lives were obtained for 19O, 26.476(9) s, and for 19Ne, 17.254(5) s. (authors)

Availability note (English)

Available from doi: http://dx.doi.org/10.1103/PhysRevLett.110.032501

Additional details

Identifiers

DOI
10.1103/PhysRevLett.110.032501;
arXiv
arXiv:1212.3579v1;

Publishing Information

Journal Title
Physical Review Letters
Journal Volume
110
Journal Page Range
p. 032501.1-032501.4
ISSN
0031-9007

INIS

Country of Publication
United States
Country of Input or Organization
France
INIS RN
47073270
Subject category
S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
Descriptors DEI
BETA DECAY; HALF-LIFE; NEON 19; OXYGEN 19; SUPERCONDUCTORS
Descriptors DEC
BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; BETA-PLUS DECAY RADIOISOTOPES; DECAY; EVEN-ODD NUCLEI; ISOTOPES; LIGHT NUCLEI; NEON ISOTOPES; NUCLEAR DECAY; NUCLEI; OXYGEN ISOTOPES; RADIOISOTOPES; SECONDS LIVING RADIOISOTOPES

Optional Information

Notes
16 refs.