Georgiĩ Vyacheslavovich Kurdyumov (on his eightieth birthday)

Abstract

The system of a magnetized sheet plasma crossed with a vertical gas flow has been proposed to produce a high H À density. Under a secondary hydrogen gas supply entering into the plasma, the peak position of the H À ion density n H À is localized in the periphery of the sheet plasma. The value of n H À increases with increasing the discharge current I d . The variation of the hydrogen negative ion density is proportional to the vacuum ultraviolet (VUV) emission intensities of the Lyman band and the Werner band in hydrogen molecular bands. The measured H À density was compared with the theoretical calculation based on the rate equation of the transport of vibrationally excited hydrogen molecules H 2 Ã ðX 1 AE g þ ; v 00 > 5Þ.

Estimates of the 7H width and lower decay energy limit

“…The authors of Ref. [14] tried to detect directly 7 H nuclei emitted in the ternary fission of 252 Cf and gave only an upper limit of 10 −4 for the 7 H yield defined with respect to the yield of 3 H. However, the lack of at least an approximate comprehension about the yields of Z = 1 nuclei, known for ternary fission (see review papers [15][16][17]), prevents us from saying that this limit is incompatible with the existence of a low-lying, narrow resonance state in 7 H. There still remains a possibility that directly detectable 7 H nuclei will be found among the products of some appropriate reactions.…”