Electron Pair Creation by a Spherically Symmetrical Field

Devons, S.; Lindsey, Greg

doi:10.1038/164539a0

Cited by 25 publications

(4 citation statements)

References 3 publications

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“…Because of the apparent feasibility of transformation of the angular spectra to massspectra and the unbiased character of the program we have systematically converted all available angular spectra from IKF and from ATOMKI and other sources into mass spectra. The oldest investigated spectrum was the celebrated angular correlation measurement of the E0 transition at 6.05 MeV in 16 O dated back to 1949 [10] and the most recent one: the study of the e + e − decay of the giant resonance decay at 22.23 MeV and the 15.11 MeV isovector M1 decay in 12 C at Stony Brook [11] The mass-distributions for symmetrical (S) pairs are shown in Fig. 2, with the Pdistribution in the left column and the branching ratio in the right.…”

Section: Back To Atomki and Furthermentioning

confidence: 99%

“…In order to test this X -boson scenario, we started a dedicated search of e + e − angular correlations in isoscalar magnetic transitions with inelastic proton scattering experiments on 12 C and 16 O, the (p, α) reaction on 19 F and the ( 3 He, pe + e − ) reaction on 10 B and 14 N targets. The first aim was to check the signal observed [7] for the isoscalar M1 ground state transition from the T=0 level at 12.71 MeV in 12 C at a high level of significance and the second aim to look for the 9 MeV/c 2 boson in the 'forbidden' 0 − →0 + (M0) transition at 10.96 MeV in 16 O.…”

Section: Introductionmentioning

confidence: 99%

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Anomalous Internal Pair Conversion Signaling Elusive Light Neutral Particles

Boer¹

2005

AIP Conference Proceedings

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In this paper we report on a systematic search for a neutral boson in the mass range between 5 and 15 MeV/c 2 in the decay of highly excited nuclei. Its signature is found a deviation in the angular correlation of the e + e − pairs from conventional internal pair conversion (IPC) resulting from of its two-body decay kinematics. With an e + e − pair-spectrometer, a number of transitions has been investigated in the α-nuclei 8 Be, 12 C and 16 O, following light ion induced reactions at low bombarding energies, first at IKF in Frankfurt and during the last years at ATOMKI in Debrecen. Startlingly, in all isoscalar transitions excess e + e − pairs are found at large angles with branching ratios with respect to the total yield ranging from 10 −2 to 10 −6 . If these deviations are all related to the two-body decay of an X-boson, this observation implies plural X-bosons. An analysis of all angular spectra with a boson search program, yields a pandemonium of more than ten candidate bosons.

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Section: Back To Atomki and Furthermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Anomalous Internal Pair Conversion Signaling Elusive Light Neutral Particles

Boer¹

2005

AIP Conference Proceedings

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“…Very few experimental results on IPC are published, and most of them on total IPC coefficients only, derived from the integral e + yield [11]. However, one very early experiment [12,13] already measured the angular correlation for the 6 MeV E1 transition in 16 O, but without any energy measurement. This and other transitions of even higher energies in light nuclei have been measured recently [14] both energy and angle resolved.…”

Section: Introductionmentioning

confidence: 99%

“…However, one very early experiment [12,13] already measured the angular correlation for the 6 MeV E1 transition in 16 O, but without any energy measurement. This and other transitions of even higher energies in light nuclei have been measured recently [14] both energy and angle resolved.…”

Section: Introductionmentioning

confidence: 99%