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GR: Fachverband Gravitation und Relativitätstheorie

GR 403: Experimente zur Gravitation

GR 403.4: Vortrag

Donnerstag, 8. März 2007, 14:45–15:00, KIP Kl. HS

On the observation of the time dilatation effect in ternary fission. — Genevieve Mouze and •Christian Ythier — Faculte des Sciences, Universite de Nice, France

This relativistic effect can explain the energy-shift of minus 6 keV reported by Ramayya et al.[1] for the gamma ray de-exciting the first 2+ state, at 3368.03 keV, of the 10Be cluster emitted together with the fragments 146Ba and 96Sr in the ternary fission of 252Cf. A velocity of 0.060c can be justified for the gamma-emitting 10Be cluster. It leads to an energy-shift of minus 6.14 (0.16) keV [2]. This result confirms that the low-energy orthogonal particle emission is caused by the double giant dipole resonance accompanying binary fission, as suggested by G. Mouze [3] and by H.Y. Han et al. [4]. The conditions of observation of this second-order Doppler effect are discussed. 1. A.V. Ramayya et al. Phys.Rev.Lett. 81 (1998) 947; 2. G.Mouze and R.A. Ricci, EPJA 21 (2004) 179; 3. G. Mouze Proceedings of the 1996 D.A.N.F. Conference, Casta Papiernicka, Slovakia,Dubna 1996, p.338; 4. H.Y. Han et al., Chin.Phys. Lett.18 (2001) 1454.