Liquid helium cryostat for esr measurements free from ...
Oct 01, 1985· The helium capacity is about 500 cm3 but only 300 cm3 of liquid helium keeps a sample at 4.2 K for 9 h when liquid nitrogen is added every 1 h. Therefore, this cryostat allows us to measure ESR spectra for the period of as long as 9 h without refilling liquid helium.
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