Cross section of Uranium-238 at different fast energies of neutron?

Dear All, The neutron cross section of element generally falls with the increase in neutron energy. But in U-238 the fission cross section at Neutron energy of 1MeV is 0.3 barns whereas it...

02 March 2017 1,600 4 View

Ideality factor for diodes?

Is there any mathematical formula there for the ideality factor of the diodes? I will be very much thankful for the above. Please send the mathematical expression for it.

08 September 2016 6,873 5 View

The pulse shaping circuit of the radiation detector?

In the radiation detector the pulse shaping circuit consists of CR-RC circuit and amplifier.The function of pulse shaping amplifier is to improve Signal to Noise ratio.It also act as a filter to...

08 September 2016 8,346 4 View

How to reduce shot noise in the semiconductor radiation detector?

Generally there are three types of noise is present in the semiconductor radiation detector.These are Thermal Noise,Shot noise and Flicker Noise.The thermal noise is removed by operating the...

08 September 2016 9,187 2 View

In radiation detector Generally the HV Bias to the detector is given through the charge sensitive Preamplifier?

08 September 2016 4,031 4 View

Neutron irradiation effect on semiconductor PIN Diode?

I have performed the neutron irradiation on the PIN Diode. I have found that the forward bias cut-in volatge has been shifted. Why these shift been observed in the neutron irradiated PIN...

06 July 2016 7,854 3 View

Why electric field is maximum at the center of the depletion region in the PN junction?

In the depletion region only uncovered ions are exiting then why we have the maximum electric field at the center of the junction?

06 July 2016 7,199 6 View

How does a guard ring in the PIN Diodes reduces the surface leakage current?

06 July 2016 6,512 2 View

Common mode signal calaculation?

Dear All, For the common mode signal the input voltage is calculated as (V1+V2)/2. Why we are calculating the common mode input signal as (V1+V2)/2 whereas in differential mode the input signal is...

04 May 2016 1,958 1 View

Tappering of channel in MOSFET with increase in Vds?

Dear All, Why there is a tappering of the channel at higher bias voltage of Vds in MOSFET?

04 May 2016 9,998 3 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

How the parameters (such as Mw, Chemical bonds, polymer bland and so on) affect the mechanic property of polymer (such as storage, loss modulus) ?

Anyone can recommend any books on such topics? Thanks in advance.

02 March 2021 8,457 2 View

Why almost every element would be metallized in sufficiently high pressure and low temperature?

(This statement is from wikipedia, BTW). What is so special about metallic bond that is limiting high-P low-T state of a matter (as long as individual atoms exist, not white dwarf of neutron star...

02 March 2021 3,309 2 View

How Relativistic effects is one reason for lanthanide contraction?

The Lanthanide contraction which is the decrease in ionic radii of the elements in the lanthanide series from atomic number 57, lanthanum, to 71, lutetium, is due to poor shielding of the 4f...

01 March 2021 2,272 4 View

Ester cleavage conditions?

Hi all, I need to cleave the ester in Ethyl 2-amino-1H-imidazole-5-carboxylate to make the carboxylic acid and retrieve the product from solution to use in downstream applications of linking to...

01 March 2021 8,766 3 View

Adherance of Polyaniline coating over stainless steel?

Is the electropolymerisation of polyaniline coating over stainless steel (SS) via Cyclic voltammetry technique is really adherant? Else how to improve the adhesion of the coating, whether any...

01 March 2021 8,220 2 View

Is there a method of determining feed digestibility without the need to re-pellet the feed?

I am aiming to determine the ADC values of a commercial fish feed, but I do not have a steam pelleter or extruder available to me. Ideally, the pellets could be coated with some inert marker....

28 February 2021 7,967 3 View

How to immerse bricks in wax ( for coating ) ?

Do we immerse the bricks horizontally or vertically ? #bricks#waterproofingsurface#civil#engeenering#chemicalengineering#wax#parafinwax

28 February 2021 6,685 2 View

For gelatin coating for culturing HUVEC.Should the gelatin be made in sterile water or PBS? Do I need to autoclave the gelatin soln after making it ?

I want to use 0.1% gelatin. Should that be made in PBS or sterile water? Should I autoclave the gelatin soln after making it in water/PBS?

28 February 2021 274 2 View