~（14）C异常长寿命的起源
Origin of the anomalous long lifetime of 14C
摘要：
采用从头算无核壳模型（abinitio no-core shell model，NCSM）和包含三核子力（3 NF）项的手征有效场论（EFT）的哈密顿量，研究了14 C到14 N的β衰变被严重抑制的微观起源. 3 NF在对β衰变的贡献之间的p壳层内引起意外的大的抵消，这将来自NN相互作用的传统的大贡献减少了一个数量级，导致14 C的长寿命。
英文摘要：
We report the microscopic origins of the anomalously suppressed beta decay of 14C to 14N using the ab initio no-core shell model (NCSM) with the Hamiltonian from chiral effective field theory (EFT) including three-nucleon force (3NF) terms. The 3NF induces unexpectedly large cancellations within the p-shell between contributions to beta decay, which reduce the traditionally large contributions from the NN interactions by an order of magnitude, leading to the long lifetime of 14C.
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