Abstract
The structure of levels of superheavy hydrogen isotopes 4–6H is analyzed on the basis of a record statistics of experimental data on the absorption of negatively charged pions by light nuclei. Qualitatively new experimental data are obtained for the spectroscopy of the superheavy hydrogen isotopes 5H and 6H. Peaks due to four resonance states of 5H are observed in the missing-mass spectra for the reaction channels 9Be(π −, pt)X and 9Be(π−, dd)X. A structure that is associated with four resonance states of 6H is observed in the missing-mass spectra for the reaction channels 9Be(π−, pd)X and 11B(π−, p 4He)X. On the basis of the results presented for ground-state parameters, it can be concluded that the binding energy of superheavy hydrogen isotopes decreases as the number of neutrons increases. Excited levels of the isotopes 5H and 6H are observed for the first time. On the energy scale, all of these states lie above the threshold for decay to free nucleons.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
A. A. Korsheninnikov et al., Phys. Rev. Lett. 90, 082501 (2003).
U. Sennhauser et al., Phys. Lett. B 103B, 1 (1981).
R. Franke et al., Nucl. Phys. A 433, 351 (1985).
A. V. Belozyorov et al., Preprint No. E7-85-966, JINR (Dubna, 1985).
D. Miljanic et al., Phys. Rev. C 33, 2204 (1986).
M. G. Gornov et al., Pis’ma Zh. Éksp. Teor. Fiz. 45, 205 (1987) [JETP Lett. 45, 252 (1987)].
A. I. Amelin et al., Pis’maZh. Éksp. Teor. Fiz. 51, 67 (1990) [JETP Lett. 51, 688 (1990)].
S. Blagus et al., Phys. Rev. C 44, 325 (1991).
D. V. Aleksandrov et al., Pis’ma Zh. Éksp. Teor. Fiz. 62, 18 (1995) [JETP Lett. 62, 18 (1995)].
Yu. Ts. Oganesyan et al., Izv. Akad. Nauk, Ser. Fiz. 66, 619 (2002).
M. Meister et al., Nucl. Phys. A 723, 13 (2003).
S. I. Sidorchuk et al., Nucl. Phys. A 719, 229c (2003).
S. Fiarman and W. E. Meyerhof, Nucl. Phys. A 206, 1 (1973).
D. R. Tilley, H. R. Weller, and G. M. Hale, Nucl. Phys. A 541, 1 (1992).
T. A. Tombrello, Phys. Rev. 143, 772 (1966).
R. C. Minehart et al., Phys. Rev. 177, 225 (1969).
M. G. Gornov et al., in LI Conference on Nuclear Spectroscopy and Structure of Atomic Nucleus, Sarov, Russia, 2001, p. 142.
D. V. Aleksandrov et al., in Proceedings of the International Conference on Exotic Nuclei and Atomic Masses (ENAM-95), Arles, France, 1995 (Editions Fronti ères, Gif-sur-Yvette, 1995), p. 329.
A. A. Korsheninnikov et al., Phys. Rev. Lett. 87, 092501 (2001).
D. R. Tilley et al., Nucl. Phys. A 708, 3 (2002).
D. V. Aleksandrov et al., Yad. Fiz. 39, 513 (1984) [Sov. J. Nucl. Phys. 39, 323 (1984)].
A. V. Belozyorov et al., Nucl. Phys. A 460, 352 (1986).
A. M. Gorbatov, V. L. Skopich, P. Yu. Nikishov, et al., Yad. Fiz. 50, 1551 (1989) [Sov. J. Nucl. Phys. 50, 962 (1989)].
M. G. Gornov et al., Pis’ma Zh. Éksp. Teor. Fiz. 77, 412 (2003) [JETP Lett. 77, 344 (2003)].
Yu. B. Gurov et al., Pis’ma Zh. Éksp. Teor. Fiz. 78, 219 (2003) [JETP Lett. 78, 183 (2003)].
M. G. Gornov et al., Izv. Akad. Nauk, Ser. Fiz. 62, 1781 (1998).
M. G. Gornov et al., Phys. Rev. Lett. 81, 4325 (1998).
F. Ajzenberg-Selove, Nucl. Phys. A 490, 1 (1988).
M. G. Gornov et al., Nucl. Instrum. Methods Phys. Res. A 446, 461 (2000).
A. M. Lane and R. G. Thomas, Rev. Mod. Phys. 30, 257 (1958).
B. Shul’gina et al., Phys. Rev. C 62, 014312 (2000).
P. Descouvemont and A. Kharbach, Phys. Rev. C 63, 027001 (2001).
Author information
Authors and Affiliations
Additional information
__________
Translated from Yadernaya Fizika, Vol. 68, No. 3, 2005, pp. 520–526.
Original Russian Text Copyright © 2005 by Gurov, Aleshkin, Behr, Lapushkin, Morokhov, Pechkurov, Poroshin, Sandukovsky, Tel’kushev, Chernyshev, Tschurenkova.
Rights and permissions
About this article
Cite this article
Gurov, Y.B., Aleshkin, D.V., Behr, M.N. et al. Spectroscopy of superheavy hydrogen isotopes in stopped-pion absorption by nuclei. Phys. Atom. Nuclei 68, 491–497 (2005). https://doi.org/10.1134/1.1891200
Received:
Issue Date:
DOI: https://doi.org/10.1134/1.1891200