Nuclear reaction leading to formation of C^14 ?

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Discussion Overview

The discussion centers around the nuclear reaction leading to the formation of Carbon-14 (C^14), with participants exploring the mechanisms and processes involved in its creation. The scope includes theoretical aspects of nuclear reactions and isotopic formation.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant inquires about the specific nuclear reaction that produces C^14, expressing uncertainty about the details of the reaction.
  • Another participant suggests that neutron capture by Carbon-13 (13C) could be a potential pathway for forming C^14, but notes the scarcity of low-energy neutrons in nature as a limiting factor.
  • A participant references the chart of nuclides as a resource to identify pathways to C^14, implying that examining surrounding nuclides may provide insights.
  • There is a repeated request for hints on how to derive the formation of C^14 from unclear reactions, indicating a lack of clarity on the topic among some participants.
  • A later reply proposes a specific nuclear reaction: 1n + 14N → 14C + 1H, suggesting that cosmic rays play a role in this process, and mentions the decay of C^14 back to Nitrogen-14 (14N) through beta decay.

Areas of Agreement / Disagreement

Participants express varying levels of understanding regarding the formation of C^14, with some proposing specific reactions while others remain uncertain. No consensus is reached on the definitive mechanism of formation.

Contextual Notes

Participants highlight the complexity of the nuclear reactions involved and the need for further exploration of related isotopes and reactions. There is an acknowledgment of the limitations in understanding the pathways to C^14 formation.

hermtm2
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Nuclear reaction leading to formation of C^14 ?

Hello.

I've got two questions from the NPRE class. One of them is to estimate how old the certain wook piece contained some amount of C^14 is. I solved it.

The real question is the second one which is
" Write down the nuclear reaction leading to formation of C^14. "

What happen with C^14 related to unclear reaction?

Thanks.
 
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14C must be formed somehow. It has Z=6, N=8 (6 protons and 8 neutrons).

n-capture by 13C would be one possibility, but there just isn't enough low energy neutrons in nature to produce all the 14C observed.

Think of a nuclear isobar - same atomic mass, but different Z - and think about what nuclear reaction might occur to produce 14C.
 


I know how to calculate Q or etc. but I have no idea how to extract the formation of the unclear action. Could you give me a little more hint?

Thanks.
 


Are you familiar with the chart of the nuclides, hermtm2? It is a chart that shows all the elements and all isotopes of each element. If you look it up and observe the nuclides around C-14, you should be able to find a common path to it.
 


hermtm2 said:
I know how to calculate Q or etc. but I have no idea how to extract the formation of the unclear action. Could you give me a little more hint?

Thanks.
What other stable radionulcides exist with A = 14? What would need to happen in order to transform it to 14C?
 


hermtm2 said:
" Write down the nuclear reaction leading to formation of C^14. "

What happen with C^14 related to unclear reaction?

Thanks.

1n + 14N [tex]\rightarrow[/tex] 14C + 1H
Via Cosmic rays.

Then,

14C [tex]\rightarrow[/tex] 14N + e- + [tex]\bar{\nu_e}[/tex]

Brain, Marshall. "How Carbon-14 is Made" 03 October 2000. HowStuffWorks.com. http://science.howstuffworks.com/carbon-141.htm 14 February 2010.
 

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