
JETP, Vol. 53,
No. 2,
p. 252 (February 1981)
(Russian original - ZhETF,
Vol. 80,
No. 2,
p. 496,
February 1981
)
Measurement of ionization threshold intensities in helium using ponderomotive force accelerated electrons
B.W. Boreham, J.L. Hughes
Received: May 14, 1980
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