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Nitrogen-13 Meaning
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Alkali Metals - 13 Compounds of sodium and nitrogen - Sodium Azide
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What does Liquid Nitrogen do to Your Face?
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Siklus Nitrogen by Ade Haniyah X MIA 5 SMA N 13
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Channel: ExamFear Education
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IGCSE Biology Revision - Part 13 - Nitrogen Cycle
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Channel: SimpleScience
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How Much Nitrous Can a Stock Engine Take? - Engine Masters Ep. 13
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Published: 2012/12/30
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Published: 2011/03/21
Channel: AgPhD
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Published: 2013/01/20
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Published: 2014/11/12
Channel: Bangalore Institute of Coaching (BICPUC) - PUC Coaching
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Channel: Jeffrey Cardona
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Published: 2013/09/11
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Nitrogen Issues #597 (From Ag PhD #597 9/13/09)
Published: 2009/09/25
Channel: AgPhD
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Soybean Nitrogen Use - Charles Shapiro - September 13, 2013
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Channel: Market Journal
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Published: 2017/05/07
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Published: 2015/06/15
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Published: 2012/12/24
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Published: 2013/10/15
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Published: 2013/02/19
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Published: 2012/08/23
Channel: kentchemistry.com
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Published: 2013/10/31
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Published: 2017/04/13
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Grace Febiola X IPA 4 /13 (SIKLUS NITROGEN)
Published: 2017/05/09
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
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Nitrogen-13
General
Name, symbol Nitrogen-13,13N
Neutrons 6
Protons 7
Nuclide data
Half-life 9.97 min
Parent isotopes 13O (Electron capture)
Decay mode Decay energy
Electron capture
Beta + 1.2003 MeV

Nitrogen-13 is a radioisotope of nitrogen used in positron emission tomography (PET). It has a half life of a little under ten minutes, so it must be made at the PET site. A cyclotron may be used for this purpose.

Nitrogen-13 is used to tag ammonia molecules for PET myocardial perfusion imaging.

Production[edit]

1H + 16O → 13N + 4He

The proton must be accelerated to a kinetic energy of about 5.55 MeV or a little more.

The reaction is endothermic (i.e. the mass of the products is greater than the reactants, so energy needs to be supplied which is converted to mass).This is one reason why the proton needs to carry extra energy to produce the nuclear reaction.

The energy difference is actually 5.22 MeV, but if the proton only supplied this energy the reactants would be formed with no kinetic energy. As momentum must be conserved, the true energy that needs to be supplied by the proton is given by:

Role in stellar fusion[edit]

The N-13 role in the CNO Cycle.

Nitrogen-13 plays a significant role in the CNO cycle, which is the dominant source of energy in stars heavier than the sun.[1]

12
6
C
 
1
1
H
 
→  13
7
N
 

γ
 
    1.95 MeV
13
7
N
 
    →  13
6
C
 

e+
 

ν
e
 
1.20 MeV
13
6
C
 
1
1
H
 
→  14
7
N
 

γ
 
    7.54 MeV
14
7
N
 
1
1
H
 
→  15
8
O
 

γ
 
    7.35 MeV
15
8
O
 
    →  15
7
N
 

e+
 

ν
e
 
2.75 MeV
15
7
N
 
1
1
H
 
→  12
6
C
 
4
2
He
 
    4.96 MeV

External links[edit]

References[edit]

  1. ^ Phillips, A.C. (1994). The Physics of Stars. John Wiley & Sons. ISBN 0-471-94057-7. 


Lighter:
nitrogen-12
Nitrogen-13 is an
isotope of nitrogen
Heavier:
nitrogen-14
Decay product of:
oxygen-13 (electron capture)
Decay chain
of nitrogen-13
Decays to:
carbon-13 (EC)

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