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Re: Physics Question

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On 7/10/2016 2:25 PM, Fabian Russell wrote:
> On Sun, 10 Jul 2016 11:15:03 -0500, Sergio wrote:
>
>>
>> found the orgional source, the answer is D,
>>
>
> If the answer is 14.4 minutes, then the reaction
> cannot be consecutive first-order reactions,
> A --> B --> C
>
> The reaction has to be a decay by two separate
> and distinct processes:
>
> A --> B, or A --> B'
>
> But this make no sense for radioactive decay because
> a nucleus does not "decay" by gamma emission.  In
> gamma emission the number of protons and neutrons
> does not change.
>
> Gamma emission is usually the result of a previous decay
> mode which leaves the nucleus in an excited state.  This
> excited state will then emit a gamma photon.  But the
> gamma emission is always a subsequent, or consecutive
> reaction.
>
> It seems to me that the problem statement is faulty.
>

You may want to look up a little history here.
I believe Rutherford was the one to classify the three different 
radiations from nuclei as alpha, beta, and gamma, and all three of them 
are considered radioactive decay even though only two of them lead to 
transmutation of elements.

-- 
Odd Bodkin --- maker of fine toys, tools, tables

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Physics Question Sergio <invalid@invalid.com> - 2016-07-07 08:28 -0500
  Re: Physics Question Poutnik <poutnik4nntp@gmail.com> - 2016-07-08 09:02 +0200
    Re: Physics Question Sergio <invalid@invalid.com> - 2016-07-08 09:19 -0500
    Re: Physics Question moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-07-08 15:06 +0000
      Re: Physics Question Odd Bodkin <bodkinodd@gmail.com> - 2016-07-08 10:11 -0500
        Re: Physics Question benj <benj@nobody.net> - 2016-07-08 17:12 -0400
          Re: Physics Question Odd Bodkin <bodkinodd@gmail.com> - 2016-07-08 16:32 -0500
            Re: Physics Question Sergio <invalid@invalid.com> - 2016-07-10 11:15 -0500
              Re: Physics Question Fabian Russell <fb@zen.info> - 2016-07-10 19:25 +0000
                Re: Physics Question Odd Bodkin <bodkinodd@gmail.com> - 2016-07-10 15:43 -0500
                Re: Physics Question Fabian Russell <fb@zen.info> - 2016-07-10 21:52 +0000
                Re: Physics Question Odd Bodkin <bodkinodd@gmail.com> - 2016-07-11 07:50 -0500
                Re: Physics Question Poutnik <poutnik4nntp@gmail.com> - 2016-07-11 17:04 +0200
                Re: Physics Question moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-07-11 01:20 +0000
      Re: Physics Question Poutnik <poutnik4nntp@gmail.com> - 2016-07-08 19:01 +0200
        Re: Physics Question Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-07-09 21:28 +0200
          Re: Physics Question moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-07-10 02:18 +0000
    Re: Physics Question Fabian Russell <fb@zen.info> - 2016-07-09 17:11 +0000

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