- #1
Orbb
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Hi,
in a lecture I was told that the cooling of neutron stars cannot happen via the 'direct' Urca process (beta decay and inverse beta decay), because the created particles cannot go into occupied states (Pauli exclusion). The 'modified' Urca process was introduced, with an additional neutron catalysing the reaction. Now what is the crucial difference here, that makes the modified Urca process an allowed one as opposed to the direct Urca?
Thank you for your answers.
in a lecture I was told that the cooling of neutron stars cannot happen via the 'direct' Urca process (beta decay and inverse beta decay), because the created particles cannot go into occupied states (Pauli exclusion). The 'modified' Urca process was introduced, with an additional neutron catalysing the reaction. Now what is the crucial difference here, that makes the modified Urca process an allowed one as opposed to the direct Urca?
Thank you for your answers.