Fe X determining magnetic fields (trac #359)

reported by: @CloudyLex

2015ApJ...807...69L (article)

A Novel Method to Determine Magnetic Fields in Low-density Plasma Facilitated 
through Accidental Degeneracy of Quantum States in Fe$^9+$ 

Li, W., Grumer, J., Yang, Y., Brage, T., Yao, K., Chen, C., Watanabe, T., Jönsson, P., 
Lundstedt, H., Hutton, R., & Zou, Y.

2015, Astrophysical Journal, 807, 69

ABSTRACT: We propose a new method to determine magnetic fields, by using the 
magnetic-field-induced electric dipole transition $3{{\
m{p```^{4}\;3{\
m{d}}{\;}^{4}
{D}_{7/2}$ $\to 3{{\
m{p```^{5}{\;}^{2}{P}_{3/2}$ in ${\mathrm{Fe}}^{9+}$ ions. This 
ion has a high abundance in astrophysical plasma and is therefore well suited for 
direct measurements of even rather weak fields in, e.g., solar flares. This transition is 
induced by an external magnetic field and its rate is proportional to the square of the 
magnetic field strength. We present theoretical values for what we will label the 
reduced rate and propose that the critical energy difference between the upper level 
in this transition and the close-to-degenerate $3{{\
m{p```^{4}\;3{\
m{d}}{\;}^{4}
{D}_{5/2}$ should be measured experimentally since it is required to determine the 
relative intensity of this magnetic line for different magnetic fields.

KEYWORDS: atomic processes, Sun: corona, Sun: magnetic fields, Sun: UV 
radiation, techniques: spectroscopic

REMOTE URL : http://dx.doi.org/10.1088/0004-637X/807/1/69

ADS URL : http://esoads.eso.org/abs/2015ApJ...807...69L

Migrated from https://www.nublado.org/ticket/359

{
    "status": "new",
    "changetime": "2019-02-04T13:02:49Z",
    "_ts": "1549285369825011",
    "description": "{{{\n2015ApJ...807...69L (article)\n\nA Novel Method to Determine Magnetic Fields in Low-density Plasma Facilitated \nthrough Accidental Degeneracy of Quantum States in Fe$^9+$ \n\nLi, W., Grumer, J., Yang, Y., Brage, T., Yao, K., Chen, C., Watanabe, T., J\u00f6nsson, P., \nLundstedt, H., Hutton, R., & Zou, Y.\n\n2015, Astrophysical Journal, 807, 69\n\nABSTRACT: We propose a new method to determine magnetic fields, by using the \nmagnetic-field-induced electric dipole transition $3{{\\\nm{p}}}^{4}\\;3{\\\nm{d}}{\\;}^{4}\n{D}_{7/2}$ $\\to 3{{\\\nm{p}}}^{5}{\\;}^{2}{P}_{3/2}$ in ${\\mathrm{Fe}}^{9+}$ ions. This \nion has a high abundance in astrophysical plasma and is therefore well suited for \ndirect measurements of even rather weak fields in, e.g., solar flares. This transition is \ninduced by an external magnetic field and its rate is proportional to the square of the \nmagnetic field strength. We present theoretical values for what we will label the \nreduced rate and propose that the critical energy difference between the upper level \nin this transition and the close-to-degenerate $3{{\\\nm{p}}}^{4}\\;3{\\\nm{d}}{\\;}^{4}\n{D}_{5/2}$ should be measured experimentally since it is required to determine the \nrelative intensity of this magnetic line for different magnetic fields.\n\n\nKEYWORDS: atomic processes, Sun: corona, Sun: magnetic fields, Sun: UV \nradiation, techniques: spectroscopic\n\nREMOTE URL : http://dx.doi.org/10.1088/0004-637X/807/1/69\n\nADS URL : http://esoads.eso.org/abs/2015ApJ...807...69L\n}}}",
    "reporter": "gary",
    "cc": "",
    "resolution": "",
    "time": "2016-06-15T23:44:00Z",
    "component": "atomic/molecular data base",
    "summary": "Fe X determining magnetic fields",
    "priority": "good to do",
    "keywords": "",
    "version": "trunk",
    "milestone": "no milestone",
    "owner": "nobody",
    "type": "enhancement"
}

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Fe X determining magnetic fields (trac #359) #361