Evidence for the emission of a 17-keV neutrino in the β decay of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">C</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>14</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>

Sur, B.; Norman, E. B.; Lesko, K. T.; Hindi, M. M.; Larimer, R. M.; Luke, P.N.; Hansen, W. L.; Häller, E. E.

doi:10.1103/physrevlett.66.2444

Cited by 139 publications

(29 citation statements)

References 21 publications

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“…It is satisfactory however that a very recent redeterruination of the fl decay spectrum of ~4C which appeared in the literature [45] after submission of our paper yields shape parameters which are in perfect agreement with the ones calculated with the functions derived in the present paper.…”

Section: Discussionsupporting

confidence: 87%

Phenomenological wave functions for the massA=14 system and a consistent description of beta decay observables

Genz

Kühner

Richter

et al. 1991

Z. Physik A - Hadrons and Nuclei

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A set of phenomenological wave functions has been derived to describe the 14N ground state and the isospin triplet consisting of the 14C ground state, the first excited state of 14N at 2.313 MeV and the 140 ground state. Elastic and inelastic electron scattering form factors, the magnetic moment of the 14N ground state and the shape factors in the /~ -+ decay have been employed in a multiparameter fitting procedure to determine the amplitudes of the wave functions in L-S coupling. The inclusion of the beta decay observables in the fit has become possible for the first time since exact formulas for the shape factor in higher order do exist. The set of wave functions deduced exhibit predominately an L = 0 contribution for the 0 +; 1 states and L --1 and 2 contributions of nearly equal weight for the 1 § 0 state. It was observed that the inclusion of the shape factors allowed a more stringent determination of the amplitudes compared to previous attempts reported in the literature and led in the case of the 0 +; 1 states to wave functions that show a small but noticeable difference within the isospin triplet. Besides the observables used for the fit, the radiative width Fy (M1) of the 2.313 MeV state in 14N can be described quite well with the derived wave functions, and in addition it has become possible to predict the pathological large ft-value of the 14C decay and the ft + value of the 140 decay precisely. The wave functions are also applied to calculate the 14N (y, g +) cross section.

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Section: Discussionsupporting

confidence: 87%

Phenomenological wave functions for the massA=14 system and a consistent description of beta decay observables

Genz

Kühner

Richter

et al. 1991

Z. Physik A - Hadrons and Nuclei

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“…Negative results have also been reported by several groups [5], and plenty of theoretical models have appeared [12][13][14][15][16][17]. These models must accomodate a lepton sector where mass eigenstates are different from lepton number eigenstates.…”

Section: Introductionmentioning

confidence: 61%

“…Evidence for a massive neutrino was first reported in 1985 [1], then in 1989 [2,3], and has been repeatedly claimed in the last year [4][5][6]. Negative results have also been reported by several groups [5], and plenty of theoretical models have appeared [12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 95%

“…The source was either implanted with the help of an accelerator [3], or was outside facing the counter Ell], or had been dissolved in the counter itself [5], using elements from the same column of the Mendeleiev Table. This technique seems promising, eliminating all possible backscattering effects. At the time this paper was written, however, the experiment was not advanced enough to deliver final results.…”

Section: Evidence For a Heavy Neutrinomentioning

confidence: 99%

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Statistical issues in the 17-keV neutrino experiments

Bonvicini

1993

Z. Physik A - Hadrons and Nuclei

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“…The 55Fe IB counting rate in the germanium detector was approximately 8000 s-1 Pileupsuppression was done using an Ortec 572 amplifier. Three types of data were recorded simultaneously on three separate ADC's: (1) Ge detector singles, (2) Ge detector singles with pileup rejection, and (3) Ge detector singles with pileup rejection and NaI detector veto. A total of approximately 145 days of 55Pe data taking were recorded in 2-3 day intervals on a PC based acquisition system.…”

Section: Inner Bremsstrahlung Spectrum Of 55fementioning

confidence: 99%