Search for Correlated Narrow-Peak Structure in the Two-Photon Spectrum from 
6-MeV/ Nucleon U + Th Collisions

Meyerhof, W. E.; Molitoris, J. D.; Danzmann, Karsten; Spooner, D. W.; Stephens, F. S.; Diamond, R. M.; Beck, E.-M.; Schäfer, A.; Müller, B.

doi:10.1103/PhysRevLett.57.2139

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Search for Correlated Narrow-Peak Structure in the Two-Photon Spectrum from 6-MeV/ Nucleon U + Th Collisions

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Danzmann, Karsten
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Citation

Meyerhof, W. E., Molitoris, J. D., Danzmann, K., Spooner, D. W., Stephens, F. S., Diamond, R. M., et al. (1986). Search for Correlated Narrow-Peak Structure in the Two-Photon Spectrum from 6-MeV/ Nucleon U + Th Collisions. Physical Review Letters, 57(17), 2139-2142. doi:10.1103/PhysRevLett.57.2139.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-5DCB-D

Abstract

We have searched for 180° (c.m.) correlated equal-energy two-photon decays produced in 6-MeV/nucleon U + Th collisions. In the summed-energy region between 1.5 and 1.8 MeV, we set an upper limit of 3 × 10-10 decay per projectile for the yield integrated over a target thickness of 3.6 mg/cm2, which corresponds to a cross section of 3 × 10-29 cm2 averaged over the target. This can be compared to a production cross section of (1-2) × 10-28 cm2, averaged over a target thickness of 0.3-0.6 mg/cm2 found by others for correlated electron-positron pairs in the same reaction.