I describe various techniques for computing widths for decay to daughter states that are themselves unbound. I present examples of their similarities and differences.

中文翻译：

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计算衰减到非束缚态的宽度的方法

我描述了用于计算衰减到本身未绑定的子状态的宽度的各种技术。我举例说明它们的异同。