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First observation of cyclotron radiation from MeV-scale following nuclear beta decay
W. Byron, H. Harrington, R. J. Taylor +30
We present an apparatus for detection of cyclotron radiation that allows a frequency-based beta energy determination in the 5 keV to 5 MeV range, characteristic of nuclear beta dec…
A Search for Possible Long Range Spin Dependent Interactions of the Neutron From Exotic Vector Boson Exchange
Christopher C. Haddock, Joseph Amadio, Eamon Anderson +26
We present a search for possible spin dependent interactions of the neutron with matter through exchange of spin 1 bosons with axial vector couplings as envisioned in possible exte…
Charge-state distribution of Li ions from the decay of laser-trapped He atoms
Ran Hong, Arnaud Leredde, Yelena Bagdasarova +12
Background: The accurate determination of atomic final states following nuclear decay plays an important role in many experiments. In particular, the charge state distributions…
Weak Interaction Studies with 6He
A. Knecht, Z. T. Alexander, Y. Bagdasarova +17
The 6He nucleus is an ideal candidate to study the weak interaction. To this end we have built a high-intensity source of 6He delivering ~10^10 atoms/s to experiments. Taking full…
Precision Measurement of the 6He Half-Life and the Weak Axial Current in Nuclei
A. Knecht, R. Hong, D. W. Zumwalt +8
Studies of 6He beta decay along with tritium can play an important role in testing ab-initio nuclear wave-function calculations and may allow for fixing low-energy constants in eff…
A liquid helium target system for a measurement of parity violation in neutron spin rotation
C. D. Bass, T. D. Bass, B. R. Heckel +7
A liquid helium target system was designed and built to perform a precision measurement of the parity-violating neutron spin rotation in helium due to the nucleon-nucleon weak inte…
Electron-capture branch of 100Tc and tests of nuclear wave functions for double-beta decays
S. K. L. Sjue, D. Melconian, A. Garcia +18
We present a measurement of the electron-capture branch of Tc. Our value, , implies that the Mo neutrino absorption cro…
Precise measurement of the ^7Be(p,gamma)^8B S-factor
A. R. Junghans, E. C. Mohrmann, K. A. Snover +8
We present new measurements of the ^7Be(p,gamma)^8B cross section from \bar{E}_{cm} = 116 to 2460 keV, that incorporate several improvements over our previously published experimen…
7Be(p,gamma)8B astrophysical S-factor from precision cross section measurements
A. R. Junghans, E. C. Mohrmann, K. A. Snover +7
We measured the 7Be(p,gamma)8B cross section from E_cm = 186 to 1200 keV, with a statistical-plus-systematic precision per point of better than +- 5%. All important systematic erro…
Positron-neutrino correlations in 32Ar and 33Ar Decays: Probes of Scalar weak currents and nuclear isospin mixing
A. Garcia, E. G. Adelberger, C. Ortiz +7
The positron-neutrino correlation in the 0^+ \to 0^+ βdecay of ^{32}Ar was measured at ISOLDE by analyzing the effect of lepton recoil on the shape of the narrow proton group follo…
Positron-neutrino correlation in the 0^+ \to 0^+ decay of ^{32}Ar
E. G. Adelberger, C. Ortiz, A. Garcia +7
The positron-neutrino correlation in the decay of Ar was measured at ISOLDE by analyzing the effect of lepton recoil on the shape of the narrow proton group…